Clue: Drone, as it were, released inside stage of rocket (6,7)
Answer: BERTIE WOOSTER
Explanation: Drone, as it were, released inside stage of rocket (6,7)
Def: drone? 
*(it were) inside BOOSTER
 
I've never read a Jeeves and Wooster book, so don't know if Wooster was a drone? (See explanation in comments)