White wine you once overturned? This may be on ice (6)
I believe the answer is:
hockey
'this may be on ice' is the definition.
(ice hockey)
'white wine you once overturned?' is the wordplay.
'white wine' becomes 'hock' (hock is a kind of white wine).
'you' becomes 'ye' (historical version of 'you').
'once overturned?' is a reversal indicator.
'ye' in reverse letter order is 'ey'.
'hock'+'ey'='HOCKEY'
(Other definitions for hockey that I've seen before include "Stick and ball game" , "Team game played with curved sticks and hard ball" , "Game with a bully-off" , "Eleven-a-side field game" , "Game started by a bully!" .)