1: Fastener made from crumpled ripple pac (9)
6: Notes spent in Germany (5)
9: A humorous writer or two (5)
10: Chinese are able to sound extremely subtle (9)
11: Host seems clever, off and on (5)
13: Essentially, what boy is wearing (3,2)
16: British aviators took off and held a drawing (7)
18: First lost inability to drop by (7)
19: Make known one pound increase after high school (7)
20: Turncoat's first motive for disloyalty (7)
21: Duck's primary seducer! (5)
22: Part of stair is erect (5)
23: Maid Marian - half American (9)
25: One who regrets following initial tendencies is increasingly sincere (5)
26: Hazardous emanation from river used by a crime boss (5)
27: The state of a fresh garment (3,6)