Baseball player in the jug (7)
I believe the answer is:
pitcher
I believe this clue is a double definition.
'baseball player' is the first definition.
(pitcher is a kind of baseball player)
'the jug' is the second definition.
(I've seen this before)
'in' acts as a link.
(Other definitions for pitcher that I've seen before include "Baseball player throws the vessel" , "American sportsman" , "Earthenware jug" , "One throwing" , "Baseball player - bowl" .)