Clue: Suggestion of a fit body, not half! Lady Chatterley's Lover, possibly? (1,3,2,5)
Answer: A BIT OF ROUGH
Explanation: Definition: Lady Chatterley's Lover, possibly
Lady C's lover was Mellors, the gamekeeper, so he was her bit of rough, but I don't understand the rest – A BIT OF = suggestion, ROUGH = half of "a fit body"? *Thanks to Tom – A FIT BO[dy] is an anagram ("rough") of A BIT OF