Snatch whiskey and relax (5)
I believe the answer is:
wrest
'snatch' is the definition.
(I've seen this before)
'whiskey and relax' is the wordplay.
'whiskey' becomes 'W' (phonetic alphabet: alpha, bravo, charlie etc.).
'and' is a charade indicator (letters next to each other).
'relax' becomes 'rest' (to relax is to have a rest).
'w'+'rest'='WREST'
(Other definitions for wrest that I've seen before include "Obtain forcibly" , "Wrench away" , "Twist" , "The old piano tuner" , "Remove with force" .)