British study food (5)
I believe the answer is:
bread
'food' is the definition.
(bread is a kind of food)
'british study' is the wordplay.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'study' becomes 'read' ('read' can be a synonym of 'study').
'b'+'read'='BREAD'
(Other definitions for bread that I've seen before include "Nan, for instance" , "Baked food; money" , "rhino" , "Staple food" , "Food made from dough" .)