Band to adorn recording system (4,4)
I believe the answer is:
tape deck
'recording system' is the definition.
'band to adorn' is the wordplay.
'band' becomes 'tape' (I've seen this before).
'to adorn' becomes 'deck' (decking is a kind of adorning).
'tape'+'deck'='TAPE DECK'
(Other definitions for tape deck that I've seen before include "Recorder" , "Drive" , "Outmoded recording machine" , "Hi-fi recording unit" .)