Pip one of the favourites at Wimbledon? (4)

I believe the answer is:

seed

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'pip' is the definition.
(thesaurus)

I cannot understand how the remainder of the clue works.

(Other definitions for seed that I've seen before include "Propagative part of plant" , "one with potential to grow up?" , "See 19" , "people decline to go to" , "offspring" .)

I've seen this clue in The Telegraph.

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