Pre-euro Irish coin (4)
I believe the answer is:
punt
'pre-euro irish coin' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for punt that I've seen before include "Pre-euro currency unit of Ireland" , "taken by a better" , "Boat; Irish ex-currency" , "old money abroad" , "Pre-euro unit of Irish currency" .)