Salary ceiling (3)
I believe the answer is:
cap
'salary ceiling' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cap that I've seen before include "Dental work" , "contribution to hunt funds?" , "Set limit to price increase - of headgear?" , "Beat; upper limit" , "Surpass with headwear" .)