League restricted by team in furtive move (5)
I believe the answer is:
sidle
'furtive move' is the definition.
(I've seen this in another clue)
'league restricted by team' is the wordplay.
'league' becomes 'l' (abbreviation).
'restricted by' indicates putting letters inside (I've seen this in other clues).
'team' becomes 'side' (both can mean a sports team).
'l' put within 'side' is 'SIDLE'.
'in' acts as a link.
(Other definitions for sidle that I've seen before include "Edge along furtively" , "Walk sideways like crab" , "sidewalk" , "Move crabwise" , "Slide (anag.)" .)