British demand queue for boundary (10)
I believe the answer is:
borderline
'boundary' is the definition.
(borderline is a kind of boundary)
'british demand queue' is the wordplay.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'demand' becomes 'order' (I've seen this before).
'queue' becomes 'line' (I've seen this before).
'b'+'order'+'line'='BORDERLINE'
'for' is the link.
(Other definitions for borderline that I've seen before include "frontier" , "Boundary" , "barely acceptable" , "Marginal n" , "divides countries" .)