Argentina's signature housing grant (6)
I believe the answer is:
assign
'grant' is the definition.
(I've seen this before)
'argentina's signature housing' is the wordplay.
'housing' indicates the answer is hidden within the clue (part of the clue houses the answer).
'ASSIGN' is hidden within 'argentinas signature'.
(Other definitions for assign that I've seen before include "Allocate, appoint" , "Allocate or transfer" , "Transfer (legal rights)" , "award" , "Give responsibility to" .)