Mountain nymph (5)
I believe the answer is:
oread
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mountain nymph</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for oread that I've seen before include "spirit at peak?" , "mountainous girl" , "classically beautiful girl" , "Maid of the Mountains" , "O dear, a strange mountain nymph" .)