Fortified wine produced by Irish troops (7)
I believe the answer is:
madeira
'fortified wine' is the definition.
(Madeira is an example)
'produced by irish troops' is the wordplay.
'produced' becomes 'made' ('make' can be a synonym of 'produce').
'by irish troops' becomes 'ira' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'made'+'ira'='MADEIRA'
Can you help me to learn more?
(Other definitions for madeira that I've seen before include "Fortified Portuguese wine" , "Atlantic island, famed for its sweet wine" , "Fortified white wine from island off NW Africa" , "drink" , "Rich, fortified white wine" .)