British capital deficit creates this sort of market? (5)
I believe the answer is:
black
'this sort of market?' is the definition.
'british capital deficit' is the wordplay.
'capital' suggests taking the first letters.
'deficit' becomes 'lack' (I've seen this in another clue).
The initial letter of 'british' is 'b'.
'b'+'lack'='BLACK'
'creates' acts as a link.
(Other definitions for black that I've seen before include "Like clubs and spades" , "Colour of soot" , "Gloomy" , "Colour of jet" , "Served without milk" .)