For the golfer, a position of rest (3)
I believe the answer is:
lie
'rest' is the definition.
(synonyms)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for lie that I've seen before include "Prevarication" , "Commit perjury" , "Untruth; rest" , "found" , "Perversion of the truth" .)