Legislator left a whiskey? God! (8)
I believe the answer is:
lawmaker
'legislator' is the definition.
(legislators make laws)
'left a whiskey? god' is the wordplay.
'left' becomes 'L' (common abbreviation).
'whiskey?' becomes 'W' (alpha bravo charlie delta ...).
'god' becomes 'maker' (as in meeting one's maker).
'l'+'a'+'w'+'maker'='LAWMAKER'
(Other definitions for lawmaker that I've seen before include "Sod, possibly" , "sitting in Parliament?" , "Legislator" .)