Erse (6)
I believe the answer is:
gaelic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">erse</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gaelic that I've seen before include "Characteristic of the Celts" , "tongue" , "Speech" , "Irish language or Celtic language of Scotland" , "The native language of Ireland" .)