Ordered a wine list — it's sizable for gourmands (9)
I believe the answer is:
waistline
'it's sizable for gourmands' is the definition.
(a gourmand might have a large waistline)
'ordered a wine list' is the wordplay.
'ordered' indicates anagramming the letters.
'a'+'wine'+'list'='awinelist'
'awinelist' anagrammed gives 'WAISTLINE'.
(Other definitions for waistline that I've seen before include "It goes round trunk" , "Girth" , "measurement" , "Swine tail (anag.)" .)