See sign involved creative act (7)
I believe the answer is:
genesis
'creative act' is the definition.
(something's origin or creation)
'see sign involved' is the wordplay.
'involved' indicates anagramming the letters (involved can mean confusing or complex).
'see'+'sign'='seesign'
'seesign' with letters rearranged gives 'GENESIS'.
(Other definitions for genesis that I've seen before include "Band; book" , "Beginning the holy book" , "Origin -- see sign (anag)" , "OT opening" , "Beginning (in the Bible)" .)