Living in water (7)
I believe the answer is:
aquatic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">living in water</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 aquatic that I've seen before include "Of the water, its animals, its sports" , "Relating to water" , "Marine - living in water" , "20 [TERRAPIN] is" , "Growing in or near water" .)