Clue: A bit of fun at last leading to hesitation by Mellors perhaps (10)
Answer: GAMEKEEPER
Explanation: A bit of fun at last leading to hesitation by Mellors perhaps (10)
**GAME** ("a bit of fun") + **KEEP** ("last") + **ER** ("hesitation") 
Oliver Mellors from *Lady Chatterley's Lover* was a gamekeeper.