Cross, using international tariff (5)
I believe the answer is:
irate
'cross' is the definition.
(thesaurus)
'international tariff' is the wordplay.
'international' becomes 'i' (abbreviation eg in IMF).
'tariff' becomes 'rate' (I've seen this before).
'i'+'rate'='IRATE'
'using' is the link.
(Other definitions for irate that I've seen before include "Not happy" , "Wild" , "Magical rod" , "Infuriated" , "Narked" .)