Grease the palm of (5)
I believe the answer is:
bribe
'grease the palm of' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bribe that I've seen before include "Illegal incentive" , "Illegal inducement" , "Bung" , "Sweetener, back-hander" , "Money offered to corrupt" .)