Men pursuing corruption in revolving bar (5)
I believe the answer is:
rotor
'revolving bar' is the definition.
(I've seen this before)
'men pursuing corruption' is the wordplay.
'men' becomes 'or' (military abbreviation for Other Ranks).
'pursuing' says to put letters next to each other.
'corruption' becomes 'rot' (I've seen this in other clues).
'or' after 'rot' is 'ROTOR'.
'in' is the link.
(Other definitions for rotor that I've seen before include "Helicopter vane" , "Helicopter lifter" , "Palindromic moving part" , "part of chopper" , "Spinner" .)