### Clue: A support that's held in extremely rebellious busts (7)
### Answer: ARRESTS 
 ### Explanation: Definition: busts
 A + [REST(a support, such as that used for a billiards cue) **contained in**(that's held in) **1st and last letters of**(extremely) "rebellious"].
Defn: … by the police, perhaps after a drug bust.