Book band or creative event (7)
I believe the answer is:
Here is my best explanation:
This clue might be a double definition.
'book band' is the first definition.
'genesis' can be an answer for 'book'. I am not sure about the 'band' bit.
'creative event' is the second definition.
'genesis' can be an answer for 'event' (genesis is a kind of event). I am not sure about the 'creative' bit.
'or' is the link.
(Other definitions for genesis that I've seen before include "Book of the Bible", "rock group", "religious book?", "Beginning the holy book", "Bible's first book", "rock band", "name of group", "birth", "Old Testament Book 1" and "creation?".)