Group round bar back for court proceedings (6)
I believe the answer is:
tennis
'for court proceedings' is the definition.
I know that 'court' relates to this answer.
'group round bar back' is the wordplay.
'group' becomes 'set' (both can mean a collection).
'round' means one lot of letters goes inside another.
'bar' becomes 'inn' (both can mean a drinking establishment).
'back' says the letters should be written in reverse.
'set' going around 'inn' is 'sinnet'.
'sinnet' written backwards gives 'TENNIS'.
Can you help me to learn more?
(Other definitions for tennis that I've seen before include "Game (where love is nought?)" , "Ball-game" , "Pete Sampras's game" , "Table -, - elbow" , "Real or lawn game" .)