New store includes British pudding (6)
I believe the answer is:
sorbet
'pudding' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'new store includes british' is the wordplay.
'new' is an anagram indicator.
'includes' means one lot of letters goes inside another.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'store' with letters rearranged gives 'soret'.
'soret' enclosing 'b' is 'SORBET'.
Can you help me to learn more?
(Other definitions for sorbet that I've seen before include "Refresher course" , "Fruit water-ice" , "Sweet" , "Strobe (anag.)" , "Sherbet, water-ice" .)