1: Pluto is cold and tired out; its a disgrace (9)
3: Violent overthrow of government up to cadet, unfortunately (4,5)
4: Boob implant cups: sad hoax in line with 15-down (8,3)
5: Chatter about some pay-back (3)
6: Flipper's conclusion (5)
7: He explored star (7,6)
8: No spot for weather forecast before snow approaches (5)
10: Liquidation of one country led by pair of fools (13)
13: Fast times with company cracked high-strung recruiter (6,5)
15: See Dennis, unfortunately, in poverty (9)
16: Ill-conceived encore run for Edward VIII, say (9)
19: Bury in the empty sepulcher, eventually (5)
20: Fancy decoration thats cool on the surface? (5)
23: Pronounced ability to smell negative votes (3)