Gourmet's dog tucked into English pie (7)
I believe the answer is:
epicure
'gourmet's' is the definition.
(synonyms)
'dog tucked into english pie' is the wordplay.
'dog' becomes 'cur' (both can mean a despicable person).
'tucked into' indicates putting letters inside.
'english' becomes 'E' (abbreviation).
'e'+'pie'='epie'
'cur' put into 'epie' is 'EPICURE'.
(Other definitions for epicure that I've seen before include "Gourmet" , "Lover of good food and drink" , "Person with refined taste in food and drink" , "Person with refined tastes in food and drink" , "Liker of fine food/drink" .)