Slimy slowpoke (5)
I believe the answer is:
snail
'slimy slowpoke' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for snail that I've seen before include "Sluggish person - kind of mail" , "Edible gastropod" , "Slow mover" , "Slow slithery mollusc" , "10 ac mollusc" .)