See sign changed for rock band (7)
I believe the answer is:
genesis
'rock band' is the definition.
(I've seen this before)
'see sign changed' is the wordplay.
'changed' indicates an anagram.
'see'+'sign'='seesign'
'seesign' anagrammed gives 'GENESIS'.
'for' is the link.
(Other definitions for genesis that I've seen before include "Creation" , "religious book?" , "Birth, beginnings" , "Origin (of the Old Testament?)" , "OT opening" .)