1: Loud den has style! (5)
2: Fifty are returning after the last hemp mixture has a short life cycle (9)
3: Believes in harnessing hydrogen for sources of propulsion (7)
4: Rose was refined, but would never make a silk purse (4,3)
5: G-man covering beat lit up Bic? (7)
6: 'Naked Gun' actor prepares to be dubbed in (in soundtrack) (7)
7: Get bunger out for renowned German printer (9)
10: Uninitiated stoop to finish (3)
13: Cynical Cajun died exercising (9)
14: Otis and Vince mad for being thrown out repeatedly (9)
16: Strip of soil bearing large heads of Belgian endive (7)
17: I am starting to sail in Lake Dunk (7)
18: Flutter the eyelids over the French shellfish (7)
19: 'I'm at the top! I am chairman of Chrysler Corporation of America.' (7)
21: On the canvas from third strike (3)
23: Reportedly, looked at sea serpent as exemplar (5)