Limerick's location (4)
I believe the answer is:
'limerick's location' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eire that I've seen before include "Gaelic name for Republic of Ireland" , "Breakaway state" , "Land" , "EU country" , "Official name of the Irish Republic, 1937-49" .)