A little coaster, perhaps (3)
I believe the answer is:
mat
'a little coaster' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for mat that I've seen before include "Small rug" , "Thick flat pad on the floor" , "Rug; without a shine" , "Shoe-cleaner" , "Dull, rug" .)