Peace agreement with power bombing cities (9)
I believe the answer is:
armistice
'peace' is the definition.
(I know that armistice is a type of peace)
'with power bombing cities' is the wordplay.
'with' means one lot of letters goes inside another.
'power' becomes 'arm' (arm can mean power or strength).
'bombing' indicates anagramming the letters.
'cities' with letters rearranged gives 'istice'.
'arm' placed within 'istice' is 'ARMISTICE'.
'agreement' acts as a link.
This may not be right. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for armistice that I've seen before include "End of hostilities" , "Agreement during war to suspend fighting" , "when shooting stops" , "Suspension of hostilities" , "Cease-fire in order to conduct talks" .)