Golfer's peg (3)
I believe the answer is:
tee
'golfer's peg' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tee that I've seen before include "Golf-peg" , "'Drive off it, half-laughing (3)'" , "supporter on course" , "support of leisure activity" , "Golfing support" .)