Fruit: love assortment (6)
I believe the answer is:
Here is my best explanation:
'fruit' is the definition.
(orange is a kind of fruit)
'love assortment' is the wordplay.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'assortment' becomes 'range' (I am not sure about this - if you are sure you should believe this answer much more).
(Other definitions for orange that I've seen before include "The colour of an Order", "Unrhymable word?", "Fruit - part of the spectrum", "shade", "Colour - fruit", "stocking filler", "Name of reigning house of the Netherlands", "Kind of sauce", "A rainbow colour" and "Colour of Northern Ireland unionism".)