Golfers want to be under it (3)
I believe the answer is:
par
'golfers want to be under it' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for par that I've seen before include "Target score (golf)" , "Normal number of strokes for a hole at golf" , "State of equality" , "Usual score at golf" , "Normal golfing score" .)