Trade ban (7)
'trade ban' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for embargo that I've seen before include "Trading restriction" , "Block" , "Ban; prohibition" , "Order intended to prevent trade" , "Boycott" .)
(Other definitions for boycott that I've seen before include "Refuse to deal with - Yorkshire and England batsman" , "Refuse to do business with" , "ex-Yorkshire cricket captain" , "Refuse to deal with - outlaw" , "Trade embargo" .)