Top copy put with Times (4)
I believe the answer is:
apex
'top' is the definition.
(apex is a top or peak)
'copy put with times' is the wordplay.
I cannot really understand how this works, but
'copy' could be 'ape' (synonyms) and 'ape' is present in the answer.
'times' could be 'x' (multiplication sign) and 'x' is present in the answer.
No letters remain.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for apex that I've seen before include "crown" , "Peak, vertex" , "Absolute peak" , "The highest point or pointed end" , "The tip or highest point (4)" .)