Mules are not sure-footed types (8)
I believe the answer is:
slippers
This clue could be a double definition.
'mules' is the first definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Perhaps you can see an association between them that I don't see?
'not sure-footed types' is the second definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Perhaps there's an association between them I don't understand?
'are' acts as a link.
Can you help me to learn more?
(Other definitions for slippers that I've seen before include "CLOTHING" , "those who fall over?" , "Indoor shoes" , "Indoor footwear" , "such may be discarded by bed" .)