1: Boxer Max returned, holding heroin, for treatment (5)
4: Noodling ragtime might make you move back and forth (7)
9: Where junior diplomats are sent to spout off (7)
10: Little bitty lines on a letter from Athens (7)
11: Grind nail head into wound (5)
12: Loaded bloke swallowed third of a slab (9)
13: Sort of uninitiated cheat (3)
14: Risk of pole womans end being upset after handy beer (11)
18: Hang back, keeping right next to person buying a jumper (11)
20: How to get around doing business, essentially (3)
21: Bunyan gets into Moores wine bottles (9)
24: Grand space for bride's mate (5)
25: Retreat is covered by Times canine expert? (7)
26: Distended, having bolted a stew (7)
27: Frenzied recital piece (7)
28: The short one may be drawn (5)