Fold of skin on the throat (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
dewlap
(Other definitions for dewlap that I've seen before include "drooping throat" , "Hanging fold of loose skin on an older neck" , "Throat's loose skin" , "one may hang by the neck" , "Fold of loose skin hanging from throat" .)