Copy Times tip (4)
I believe the answer is:
apex
'tip' is the definition.
(thesaurus)
'copy times' is the wordplay.
'copy' becomes 'ape' ('ape' can be a synonym of 'copy').
'times' becomes 'x' (multiplication sign).
'ape'+'x'='APEX'
(Other definitions for apex that I've seen before include "reasonable fare" , "The tip or highest point (4)" , "Topmost point" , "Uppermost point" , "The highest point or pointed end" .)