Stout or fortified wine left years (6)
I believe the answer is:
portly
'stout' is the definition.
(I know that stout can be written as portly)
'fortified wine left years' is the wordplay.
'fortified wine' becomes 'port' (port is a type of fortified wine).
'left' becomes 'l' (common abbreviation).
'years' becomes 'y' (abbreviation).
'port'+'l'+'y'='PORTLY'
'or' acts as a link.
(Other definitions for portly that I've seen before include "Stout and dignified" , "Somewhat overweight" , "Rotund" , "with corporation" , "Rather fat" .)