Fold of skin (6)
I believe the answer is:
dewlap
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fold of skin</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for dewlap that I've seen before include "Some hide" , "Fold of loose skin that hangs below the neck" , "Fold hanging beneath animal's throat" , "drooping throat" , "Hanging fold of loose skin on an elderly person's neck" .)