### Clue: Flipping doolally! Pair chap with one fighting on set, perhaps (10)
### Answer: STUNTWOMAN 
 ### Explanation: Definition: one fighting on set, perhaps
  **Reversal of**(Flipping) NUTS(crazy;doolally, originally military slang from the town near Bombay, the site of a military sanatorium) + TWO(a pair) + MAN(a chap). 
Answer: One who performs, say;perhaps, fighting scenes on a film set.