Fruit sounding nothing like a peach (4)

I believe the answer is:

ugli

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'fruit' is the definition.
(I know that Ugli is a fruit)

I don't understand how the rest of the clue works.

(Other definitions for ugli that I've seen before include "Sweet variety of tangelo from Jamaica" , "(Repulsive-looking?) fruit" , "Citrus fruit of the West Indies" , "Unattractive-sounding fruit?" , "Black/violet element" .)

I've seen this clue in The Globe and Mail.

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