Fruit – a variety of melon (5)
I believe the answer is:
lemon
'fruit' is the definition.
(I know that lemon is a fruit)
'aeur a variety of melon' is the wordplay.
'melon' anagrams to 'LEMON'.
However, I am not clear how the anagram is indicated.
Can you help me to learn more?
(Other definitions for lemon that I've seen before include "Fruit; sort of grass, sole" , "Small evergreen fruit tree" , "definitely not a peach" , "something unattractive" , "certainly not a plum!" .)