Eight unclued lights are of a kind.
 

 Across

1    Place to take off sari, pants and slip (8)
8    Theatre oddly chucked out piano and mouth organ (4)
13    Barman mixing vodka and rum without hesitation (6)
14    Facade metaphorically protecting the scholarly world (7)
15    Stand our ground round buildings (8)
19    Exercise, sport and vehicles enthralling current South Americans (9)
20    Explosive philanthropist shunning British Christmas (4)
21    Lift man out, taking it slowly at first (4)
24    George I vacuously discusses hypothetical figures (6)
29    Indefinite number are cycling close by (4)
30    Sound of throat-clearing initially after horribly embarrassing moment (4)
32    Lecture wrong old man about interrupting witness (9)
37   ...