In Hollywood, John Barry, having had some music cut for soap? (8)
I believe the answer is:
toiletry
'in hollywood john barry having' is the definition.
I can't judge whether this defines the answer.
'some music cut for soap?' is the wordplay.
'some music cut' becomes 'ry' (I can't justify this - if you can you should give a lot more credence to this answer).
'for' means one lot of letters go next to another (I've seen this in other clues).
'soap?' becomes 'toilet' (toilet soap is a kind of soap).
'ry' put after 'toilet' is 'TOILETRY'.
'had' is the link.
Can you help me to learn more?
(Other definitions for toiletry that I've seen before include "cosmetic" , "Such as soap" , "Something for the bathroom" , "Item used in ablutions" .)