Extra pears were used (5)
I believe the answer is:
spare
'extra' is the definition.
(both can mean left over)
'pears were used' is the wordplay.
'pears' can be anagrammed to 'SPARE'.
However, I'm not clear how this is indicated.
Can you help me to learn more?
(Other definitions for spare that I've seen before include "slit at top of trousers in Scotland" , "Thin; left over" , "Additional - for use when needed" , "Extra item just in case" , "Refrain from using" .)