Sea-eagle, river and lough (4)

I believe the answer is:

erne

(Other definitions for erne that I've seen before include "Irish river - sea eagle" , "Great lake in Fermanagh with lots of islands" , "River and lake of the North" , "Seabird" , "Large bird" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.

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