Irish tongue (4)
I believe the answer is:
erse
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">irish tongue</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for erse that I've seen before include "Name sometimes given to languages of the Celts in Ireland and Scotland" , "Old Gaelic for the seer" , "Old name for Celtic languages" , "Celtic tongue" , "Possibly the language" .)