Sports ground concerning clubs (3)
I believe the answer is:
rec
'sports ground' is the definition.
(abbreviation for recreation ground)
'concerning clubs' is the wordplay.
'concerning' becomes 're' (both can mean on a particular topic).
'clubs' becomes 'c' (abbreviation used in card games such as bridge).
're'+'c'='REC'
(Other definitions for rec that I've seen before include "record" , "play area" , "pleasure area" , "Recreation ground (informal)" , "Sporting venue" .)