Move through water (4)
(Other definitions for wade that I've seen before include "Walk with legs partly immersed" , "Stride through river" , "Walk with effort through water" , "Walk through shallow water" , "Virginia who won Wimbledon" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">move through 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 swim that I've seen before include "To be in the .... is knowing what is going on" , "Travel through water" , "Do the dog paddle, perhaps" , "Do crawl, perhaps" , "German submarine" .)