1: That may be reversed, but his son sits around pointlessly. (4,2,3)
10: Take Chair in university (3)
11: In the manner of a girl (3)
12: Emergency room stocks one sensitive organ (3)
13: Nightwear and jersey top added in afterthought (3)
14: Sent one page rewritten in military lingo (11)
15: Excessively sentimental dunderhead in the river (5)
16: I am a blond, going to pot around the midsection (9)
17: Long train traveling to city near Washington (9)
20: I hear you require a massage. (5)
23: Employ heart-broken Spartans where disaster came to pass. (11)
25: Venomous enemy lurks in Caspians (3)
26: Solo, the pilot rises? No way (3)
27: Greek characters suggest dawn (3)
28: A hint for the snooker champ? (3)
29: Infection leads from partly uncooked steak (3)
30: Body English for a billiards shot (5)
31: Waste pores vent exhausted resources (9)