Smooth mover with a nice skin (5)
I believe the answer is:
snake
This could be a double definition.
'smooth mover' is the first definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'nice skin' is the second definition.
The answer and definition can be both animals as well as being singular nouns.
Maybe there's a link between them I don't understand?
'with a' is the link.
Can you help me to learn more?
(Other definitions for snake that I've seen before include "Slithering reptile" , "Part of plant or hair" , "Long slender reptile" , "Asp, perhaps?" , "former EC currency band" .)