In favour of international boycott (7)

I believe the answer is:

protest

'boycott' is the definition.
(thesaurus)

'in favour of international' is the wordplay.
'in favour of' becomes 'pro' (I've seen this before).
'international' becomes 'test' (I've seen this before).
'pro'+'test'='PROTEST'

(Other definitions for protest that I've seen before include "Public demonstration" , "Objection from potters" , "Express opposition" , "Statement or action showing disapproval" , "Express dissent" .)

I've seen this clue in The Telegraph.

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