Putting on smart clothing heading for amateur golf (7)
I believe the answer is:
staging
'putting on' is the definition.
(as in putting on a show)
'smart clothing heading for amateur golf' is the wordplay.
'smart' becomes 'sting' (both can mean to burn or hurt).
'clothing' is an insertion indicator (some letters cover up or clothe others).
'heading for' indicates taking the first letters.
The first letters of 'amateur golf' is 'ag'.
'sting' enclosing 'ag' is 'STAGING'.
(Other definitions for staging that I've seen before include "Putting on (a play)" , "in the greenhouse" , "Mounting (a play)" , "Putting on a show" .)