1: Public school game on festive occasions (4,5)
2: Late Greek god betraying no emotion (7)
3: Oxygen is pretty amusing. (3)
4: Wizards covered in liquor and beer...it might be for charity (7, 4)
5: Fly from Arab's condemnation (7)
6: Leather factory or solarium? (7)
7: A bad back not yet eliminated (5)
9: Enter names - register only lists beginners (5)
14: I see marks on jumbled party favors (11)
16: Author of Breathe Out, Lay Out, Going Out? (4,5)
17: Sun god, after climbing once more, falls (7)
18: Cretins destroyed tank (7)
19: Hates and gets rid of a Mensa entry requirement? (7)
20: Mousy girlfriend loses head and bellybutton (5)
21: Dyslexic's tired and distressed (5)
25: Infection leads from partly uncooked steak (3)