Escargot, eg (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
snail
(Other definitions for snail that I've seen before include "Edible gastropod" , "Soft-bodied garden animal with shell" , "French delicacy" , "Proverbially slow moving mollusc" , "Edible terrestrial mollusc" .)