Seize the remedy, drinking a pint (7)
I believe the answer is:
capture
'seize' is the definition.
(capturing is a kind of seizing)
'the remedy drinking a pint' is the wordplay.
'the remedy' becomes 'cure' ('cure' can be a synonym of 'remedy').
'drinking' indicates putting letters inside.
'pint' becomes 'pt'.
'a'+'pt'='apt'
'cure' enclosing 'apt' is 'CAPTURE'.
(Other definitions for capture that I've seen before include "Take by force" , "Ensnare" , "Take (eg, chess piece)" , "Take opponent's piece (chess)" , "Seize, catch" .)