Found in water (7)
I believe the answer is:
aquatic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">found in water</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 aquatic that I've seen before include "Pertaining to water" , "Watery (environment)" , "such as teal?" , "Of the water, its animals, its sports" , "Plant living in water" .)