Origin of a Wimbledon favourite (4)
I believe the answer is:
seed
This clue is a double definition.
'origin' is the first definition.
(seed is a kind of origin)
'a wimbledon favourite' is the second definition.
(tennis players are seeded)
'of' is the link.
(Other definitions for seed that I've seen before include "one of the top players" , "Kernel" , "From which things grow" , "See 19" , "Court favourite" .)