Men on dock and deck (5)
I believe the answer is:
orlop
'deck' is the definition.
(a deck on a ship)
'men on dock' is the wordplay.
'men' becomes 'OR' (military abbreviation for Other Ranks).
'on' is a charade indicator (letters next to each other).
'dock' becomes 'lop' (both can mean to cut).
'or'+'lop'='ORLOP'
'and' acts as a link.
(Other definitions for orlop that I've seen before include "Ship's lowest deck" , "part of ship" , "hold covering" , "deck at the lowest point" , "Lowest deck of a wooden sailing ship" .)