1: Intruders bury proles in pieces (11).
5: Half disapprove of old king (3)
7: Article proscribes old Greeks (7)
9: Earthenware bowl eventually replacing fragment of prehistoric drawing (7)
10: Bumped into yours truly at junction (3).
11: Inspects old radical for a moment (5, 6)
13: Doctor East, half American, is a wishful thinker (7)
15: Non-professional laggard goes underground (4,3)
16: Arguments about a couple of arcane taxes (7)
19: Wealthiest Rhode Island bureau (7)
22: Bobbed beneath in playful attempt to drown journalist. (6, 5)
24: A hint for the snooker champ? (3)
25: Junk food--its odor? Stinky (7)
26: Person of wealth and distinction extremely beautiful to Her Majesty, a horse doper (7)
27: Its a firm, small lettuce (3)
28: Thats sensible; has the eagle perhaps landed? (4-2-5)