C-in-C on Rocket? (7)
I believe the answer is:
warhead
I believe this is a double definition.
'c-in-c' is the first definition.
(commander in chief is a warhead)
'rocket?' is the second definition.
(thesaurus)
'on' is the link.
(Other definitions for warhead that I've seen before include "explosive container" , "Explosive missile part" , "Missile explosive unit" , "Explosive part of a weapon" , "Charge" .)