Group with hunk rehearsed play (3,5)
I believe the answer is:
set piece
'rehearsed play' is the definition.
(I've seen this before)
'group with hunk' is the wordplay.
'group' becomes 'set' (both can mean a collection).
'with' is a charade indicator (letters next to each other).
'hunk' becomes 'piece' (hunk can mean a portion or lump).
'set'+'piece'='SET-PIECE'
(Other definitions for set piece that I've seen before include "Standard manoeuvre" , "Formal and carefully structured speech" , "Something arranged for maximum effect" , "Elaborately arranged display" , "Elaborate firework" .)