Pep with expression of triumph when reversing hybrid (7)

I believe the answer is:

tangelo

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'hybrid' is the definition.
(thesaurus)

I don't understand the remainder of the clue.

(Other definitions for tangelo that I've seen before include "Hybrid fruit; eat long (anag.)" , "Mixed fruit" , "one cross, sour" , "Citrus hybrid - goal net (anag)" , "sharp cross" .)

I've seen this clue in The Times.

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