1: Venomous enemy lurks in Caspians (3)
3: Support sign for subordinates (11)
9: Massive dinosaur hiding in Antigua? No, Donna! (9)
10: Help found in Adelaide. (3)
11: Noble start to resistance in French resistance movement (7)
12: Ms. Lane swallows last of lean cuts of meat (5)
13: Paraphrasing 'A Certain Sport': 'Wait till next year!' (13)
16: Minor change in the White House? (6-3-4)
19: Ensemble originally formed with ocarina, cello, theremin, euphonium, and tabla (5)
21: Cocktail set king supporting the flag (4,3)
23: Sounds like everything: a bore (3)
24: Inmate Ian playing dead (9)
25: E.g., told story about cave-men (11)
26: I am reported to leer (3)