Cheat doubly to get US apartment (5)
I believe the answer is:
condo
'us apartment' is the definition.
(type of US apartment)
'cheat doubly' is the wordplay.
'cheat' becomes 'con' (con is a kind of cheat).
'doubly' becomes 'do' (I can't justify this - if you can you should give a lot more credence to this answer).
'con'+'do'='CONDO'
'to get' acts as a link.
(Other definitions for condo that I've seen before include "accommodation out west" , "American apartment" , "Apartment in North America" , "flat" , "apartment block in Toronto" .)