Diver's garment (3,4)
(Other definitions for wetsuit that I've seen before include "Garment worn by some skin-divers" , "Garment worn by a diver" , "diving gear" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">diver's garment</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 wet suit that I've seen before include "Diver's rubber gear" , "Sportswear" , "Garment worn by a diver" , "Diving attire" , "Garment worn by divers etc" .)