Nymph (5)
(Other definitions for naiad that I've seen before include "Spring nymph" , "Aquatic larva of a dragonfly" , "Classic spirit" , "divine female figure" , "spirit in water" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">nymph</span>' is the definition.<br/ ><span class="explanation-format__explanation">(dryad is a kind of nymph)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dryad that I've seen before include "Nymph of the woods" , "Beautiful young woman" , "minor divinity" , "Wood-nymph" , "Woodland nymph" .)