Graduate is taken with league in Swiss city for sport (8)
I believe the answer is:
baseball
'for sport' is the definition.
(baseball is a kind of sport)
'graduate is taken with league in swiss city' is the wordplay.
'graduate' becomes 'BA' (someone with a Bachelor of Arts degree).
'is taken with' is a charade indicator (letters next to each other).
'league' becomes 'l' (abbreviation).
'in' is an insertion indicator.
'swiss city' becomes 'basel' (I've seen this before).
'ba'+'l'='bal'
'bal' put inside 'basel' is 'BASEBALL'.
(Other definitions for baseball that I've seen before include "US/Canadian game" , "American team gave" , "Popular American sport" , "Game played in the strange sable lab" , "Game played on a diamond" .)