Visual aspect of a fresh pear canapé (10)
I believe the answer is:
appearance
'visual aspect' is the definition.
(synonyms)
'fresh pear canape' is the wordplay.
'fresh' indicates an anagram (a fresh re-ordering of the letters).
'pear'+'canape'='pearcanape'
'pearcanape' with letters rearranged gives 'APPEARANCE'.
'of a' acts as a link.
(Other definitions for appearance that I've seen before include "Act of being present - look" , "Advent" , "Look; impression given" , "Semblance" , "it seems" .)