Everything for Montgomery? (3,4,5)
I believe the answer is:
the full monty
'everything' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for the full monty that I've seen before include "British 1997 film featuring male strippers" , "Everything - 1997 Sheffield-based film" , "British film with unemployed steel workers" , "Everything possible - British film" , "Something in its entirety" .)