2: All for naught, perhaps; not many upset (7)
3: Blunder into tall African mammal, with no infrared (5)
4: Terrier shows how to stray (3)
5: Squirrel with a fuzzy caterpillar, say? (5)
6: Al's gamble on outcome of sports (4,5)
10: Private dinner starts late (5)
12: Town's rail transport, not express? (9)
14: Pen extracts articles from satay (3)
16: Club with space for some money (3)
17: I've lost struggle (3)
18: Taint corrupted giant (5)
20: Evil, as written about a discolouration (7)
22: Powerless to move, as shiner tremendously shows (5)
23: God! Get real! There's no point getting upset (3)
24: Good Republican source of life-giving system for short-handed office workers (5)
26: Toothpaste brand at Target? (3)