River nymph (5)
I believe the answer is:
naiad
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">river nymph</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 naiad that I've seen before include "divine female figure" , "Spring nymph" , "Greek mythological water nymph" , "Nymph of lakes, springs and rivers" , "River nymph" .)