Your band playing as a four, sometimes two more (8)
I believe the answer is:
boundary
'a four sometimes two more' is the definition.
(cricket term)
'your band playing' is the wordplay.
'playing' indicates anagramming the letters.
'your'+'band'='yourband'
'yourband' anagrammed gives 'BOUNDARY'.
'as' is the link.
(Other definitions for boundary that I've seen before include "march" , "Line marking the outer limits" , "Six, perhaps" , "4 possibly" , "Border (especially in cricket)" .)