Clue: 10 player in fanciful Midlands fen, say? (6,5)
Answer: DUDLEY MOORE
Explanation: Definition: 10 player
Presumably the West Midlands town of Dudley doesn't have a moor, but if it did (hence the "fanciful") it would sound like this; and Dudley Moore acted (played) in the film 10, with Julie Andrews as his wife and Bo Derek as the "perfect woman" (with a score of 10/10)