Shrink coming round for copy (9)
I believe the answer is:
reproduce
'copy' is the definition.
(thesaurus)
'shrink coming round for' is the wordplay.
'shrink' becomes 'reduce' (reducing is a kind of shrinking).
'coming round' means one lot of letters goes inside another.
'for' becomes 'pro' (I've seen this before).
'reduce' going around 'pro' is 'REPRODUCE'.
(Other definitions for reproduce that I've seen before include "Ape" , "achieve propagation" , "To propagate" , "Duplicate" , "Procreate or make a copy" .)