Across:
1 Wasn’t honest (lied = LI-ED) about American college (Massachusetts Institute of Technology = -MIT-) option (CHOICE) (LIMITED CHOICE), as the alternative doesn’t amount to much (LIMITED CHOICE),
10 One (I-) serial (serial = -SRAELI) adaptation (= anagram indicator) (ISRAELI) of Living in the Middle East (ISRAELI),
11 Part of an Indian (BASMATI rice) camp (base) cut short (‘base’ without ‘e’ = BAS-) for runner (-MAT-) on island (-I) (BASMATI),
12 Those little troublemakers (IMPS) in The Simpsons (in ‘The Simpsons’ = IMPS),
13 Indirectly suggest (IMPLY) 12 across, for the most part (s) (‘imps’ without ‘s’= IMP-), is from heartless (a) place (‘lay’ without ‘a’ = -LY) (IMPLY),
15 Vehicle (MINI) for some of the fascism in Italy (for some of the ‘fascism in Italy’ = m in I = MINI),
17 A (A-) retweet (-RT) (ART) from the Louvre (ART),
19 Flag (ENSIGN) number of points (east + north = E+N = EN-) for one of the Languages (-SIGN language) (ENSIGN),
21 Kildare (K-E) contains elevated (= reversal indicator) ancient hill that’s famous (Tara = -ARAT-) (KARATE) for combat (KARATE),
22 Tight space (LIMITED) all around the current edges? (LIMITED on all sides of today’s grid),
23 Say again (PARROT) – who’s the mouthy bird? (PARROT),
25 Foreign spirit (GRAPPA) doctor (G-P-) outside Knock (knock = -RAP-) is anonymous (-A) (GRAPPA),
27 Settle down (SIT down) and retire (= reversal indicator) in The Blasket Islands? (in ‘The Blasket Islands’ = t Is = tis = SIT),
29 Wander about (ROVE) with controversial characters (‘controversial’ characters = ROVE),
30 Rents (rents = STERN) building (= anagram indicator) for firm (firm/strict = STERN),
31 Serves up (= reversal indicator) port (-P) and crackers (mad = DAM-) (DAMP) when it’s clammy (DAMP),
34 Order (O-) fishy (= anagram indicator) soups (soups = -POSSU-) at start of meal (start of ‘meal’ = -M) (OPOSSUM) for beastly type from America (OPOSSUM),
35 Foolish fancy (CHIMERA) of that man (-HIM-) in hospital (-ER-) in California (C-A) (CHIMERA),
36 Flavour (SEASON) in short supply (LIMITED) from the start (= positional indicator) (LIMITED SEASON) in reduced summer stock? (LIMITED SEASON).
Down:
2 Angry (= anagram indicator) purist (purist = IR-UPTS) locks door at foundation (‘door’ at foundation = -R-) (IRRUPTS) or enters forcibly? (IRRUPTS),
3 Concealed by Euclidean (Concealed by Euclidean = IDEA) rough calculation (IDEA),
4 Hemingway ignores why (‘Hemingway’ ignores ‘why’ = eminga = ENIGMA) this is hard to fathom (ENIGMA),
5 Firm (CO-) is almost (d) rotten (‘bad’ without ‘d’ = -BA-) with officer (lieutenant = -LT) (COBALT) in blue (COBALT),
6 Remove from office (OUST) piece of spurious technology (piece of ‘spurious technology’ = ous t = OUST),
7 Nazi car (Nazi car = CZARINA) transporting (= anagram indicator) European ruler (CZARINA),
8 Bound (bound/restrict = LIMIT-) to get to writer (-ED) finishing sentence (full stop = PERIOD) (LIMITED PERIOD) in the short term (LIMITED PERIOD),
9 Restricted (LIMITED) American (A-) apple (apple = -PPEAL) brew (= anagram indicator) (LIMITED APPEAL) – it’s not everyone’s cup of tea (LIMITED APPEAL),
14 Slag off plagiariser (‘slag’ off ‘plagiariser’ = piarier = PRAIRIE) in Savannah (PRAIRIE),
16 Soldier (GI = IG-) returns (= reversal indicator) from centre overlooking (centre ‘overlooking’ = -LOO) (IGLOO) residence way up north (IGLOO),
18 Minister (minister/father = PADRE) can’t leave tap dancer (‘cant’ leave ‘tap dancer’ = apder = PADRE),
20 Lousy type (NIT) is undercover by definition (is undercover by ‘definition’ = NIT),
21 It’s no barrel of laughs (it’s a barrel of beer = KEG) engrossed in Kierkegaard (KEG engrossed in ‘Kierkegaard’),
24 Dishy type of Italian (RAVIOLI) artist (RA-) on endless (n) fiddle (“violin” without “n” = -VIOLI) (RAVIOLI),
26 Controlling treatment (PLACEBO) of Spike (spike = -LACE-) Bishop (-B-) in Post Office (P-O) (PLACEBO),
27 Items (items = ST-MIE) spread (= anagram indicator) around yellow primarily (yellow ‘primarily’ = -Y-) (STYMIE) in snooker (snooker/obstruct = STYMIE),
28 Fools (TRICKS) stick (stick = T-ICKS) out (= anagram indicator) crossing over river (-R-) (TRICKS),
32 It’s a (it’s a = itsa = ASTI) retrospective (= reversal indicator) from wine producing region (ASTI),
33 Ned leaves Ireland (‘Ned’ leaves ‘Ireland’ = irla = LIRA) for Turkish capital (LIRA).