Player to watch a lot? (4)
I believe the answer is:
seed
'player' is the definition.
(seed is a kind of player)
'watch a lot?' is the wordplay.
'watch' becomes 'see' (seeing is a kind of watching).
'a lot?' becomes 'd' (**).
'see'+'d'='SEED'
'to' is the link.
(Other definitions for seed that I've seen before include "Race" , "Source -- germ" , "A plant grows from it" , "Plant reproducer" , "favourite player" .)