Group of players groaned audibly (4)
I believe the answer is:
side
'group of players' is the definition.
(I've seen this before)
'groaned audibly' is the wordplay.
'groaned' becomes 'sighed' (I've seen this before).
'audibly' shows a homophone (sound like).
'sighed' is a homophone of 'SIDE'.
(Other definitions for side that I've seen before include "Particular aspect" , "Flank; sports team" , "by no means a front" , "[MAN U], perhaps" , "Minor" .)