Dismissed peacekeeping force captured in heavy defeat (3,3)
I believe the answer is:
run out
'dismissed' is the definition.
(cricket term)
'peacekeeping force captured in heavy defeat' is the wordplay.
'peacekeeping force' becomes 'un' (I am not sure about this - if you are sure you should believe this answer much more).
'captured in' indicates putting letters inside.
'heavy defeat' becomes 'rout' (I've seen this before).
'un' put into 'rout' is 'RUN-OUT'.
Can you help me to learn more?
(Other definitions for run out that I've seen before include "leak" , "Dismissed while attempting to sprint between the wickets" , "Exhaust the supply of" , "Come to an end" , "being dismissed by umpire" .)