British economist (6)
I believe the answer is:
keynes
'british economist' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for keynes that I've seen before include "Milton -, new town" , "English economist, d. 1946" , "20th century economist" , "John Maynard --, English economist" , "SECOND PART OF 15" .)