Italian agreement reversed by the French — in Ireland? (4)
I believe the answer is:
isle
'ireland?' is the definition.
(Ireland is an example)
'italian agreement reversed by the french' is the wordplay.
'italian agreement' becomes 'si' ('yes' in Italian).
'reversed' says the letters should be written backwards.
'by' means one lot of letters go next to another.
'the french' becomes 'le' ('the' in French).
'si' back-to-front is 'is'.
'is'+'le'='ISLE'
'in' acts as a link.
(Other definitions for isle that I've seen before include "Lies about small land mass." , "eg Capri" , "what Donne implied he wasn't" , "Rum, for example" , "'This scepter'd - - (Shakespeare)" .)