Golfer Ernie (3)
I believe the answer is:
els
'golfer ernie' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for els that I've seen before include "Ernie - - (golfer)" , "US urban railways" , "South African golfer" , "Successful owner of several clubs" , "Angular distances above the horizon" .)