Wasteful gourmand round bar with beer in short measure (8)
I believe the answer is:
prodigal
'wasteful' is the definition.
(synonyms)
'gourmand round bar with beer in short measure' is the wordplay.
'gourmand' becomes 'pig' (both can mean someone who likes food).
'round' means one lot of letters goes inside another.
'bar with' becomes 'rod' (both can mean a pole or stick. I am not sure about the 'with' bit.).
'beer' becomes 'ale' (type of beer).
'in short measure' means to remove the last letter (the word is shortened).
'pig' placed around 'rod' is 'prodig'.
'ale' with its last letter removed is 'al'.
'prodig'+'al'='PRODIGAL'
(Other definitions for prodigal that I've seen before include "reckless" , "Extravagant - lavish" , "Squandering" , "Wastefully extravagant" , "Profligate" .)