1: Some unpretentious language! (5)
4: Lined salt shaker made ready for use (9)
8: Algerian city has grand musical instrument (5)
9: I bang rock, disturbing snake (4,5)
11: Aunt Peg really messed up the cheap seats (6,7)
13: Rejecting help, soldiers taking numbers for identification (9)
14: A humorous writer or two (5)
16: Navigate by terse directions (5)
17: A single AA battery produces no pain (9)
20: Foresees a three iron, just as Cassandra did. (7, 6)
22: It's expedient to engage in habit-forming activity (9)
24: Finger in pot, stirring (5)
25: Show sadness when fruit gets cut out (4,1,4)
26: Going back in where GI trapped predator (5)