Fruit of the lemon variety (5)
I believe the answer is:
melon
'fruit' is the definition.
(melon is a kind of fruit)
'the lemon variety' is the wordplay.
'variety' is an anagram indicator.
'lemon' with letters rearranged gives 'MELON'.
'of' is the link.
(Other definitions for melon that I've seen before include "Type of fruit" , "Member of the gourd family" , "Eg, cantaloupe, galia" , "Edible gourd" , "Type of pepo" .)