Relaxing, each succeeded in golf (6)
I believe the answer is:
easing
'relaxing' is the definition.
(thesaurus)
'each succeeded in golf' is the wordplay.
'each' becomes 'ea'.
'succeeded' becomes 's' (genealogical abbreviation).
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'ea'+'s'+'in'+'g'='EASING'
(Other definitions for easing that I've seen before include "relaxing" , "Moderation - relief" , "Relieving tension" , "Making lighter" , "Calming - relaxation" .)