1: Youngster giving wounded first aid (5)
6: Ripped off a group of hard-up Edwardians (5)
10: Exchange recipe describing a small amount of relish on rolled up taco (11)
11: Bounder beheaded by slippery swimmer (3)
12: Big flowers for VIPs? (4,7)
13: Perfect counter-spy equipment (3)
15: 27-across about starting off 1-down world unconditionally (2,3,2,4)
17: Steer TS into alternative routes (4,7)
20: Sheep to start wallowing in ease (3)
22: Conclude a recitation off-key (11)
24: Height is equal to three-fifths of the first one (3)
25: A properly run lottery might be a complete success (1,5,5)
26: One final, huge Greek goddess (3)
27: To escape with lover from Warsaw, man climbs last section of fence (5)
28: Zealous police action captures leader of blackmailers (5)