1: One young lady who is out of order (5)
4: Director Michael Festers goes back in closet (9)
9: Guess what the benighted marksman did? (4,2,3,4)
10: Prohibit an attorney's organization (3)
11: To accept covert mission, in brief, is an opening for chaos (7)
13: Di returned to me in France: back for the turn of phrase. (5)
14: Lily Tomlin character inside her nest in Ecuador (9)
17: Unfallen in gradual encirclement of city! (9)
18: Subsequently change, when Al turns around? (5)
20: Deepest swimming is totally immersed (7)
21: Right, turn right to play with robot (3)
23: Modernise rear, in the opinion of escort (5,2,2,4)
25: Tide, for example, has to stop fellow (9)
26: Woodland deity posed six months (5)