Melon peel (4)
I believe the answer is:
rind
'melon peel' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rind that I've seen before include "Outer skin of citrus fruit" , "The peel of a fruit" , "Skin of orange or melon" , "Fruit skijn as of orange" , "Fruit covering" .)