I see Tim rewriting catalogue (7)
I believe the answer is:
itemise
'catalogue' is the definition.
(both can mean to make a list)
'i see tim rewriting' is the wordplay.
'rewriting' indicates an anagram.
'see'+'tim'='seetim'
'seetim' anagrammed gives 'temise'.
'i'+'temise'='ITEMISE'
(Other definitions for itemise that I've seen before include "break down" , "List one by one (S, not Z)" , "Formulate a list" , "List, state each object" , "List exhaustively" .)