Slipperiness of rim (3)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
lip
'rim' is the definition.
(both can mean the edge of something)
'slipperiness' is the wordplay.
'LIP' is hidden within the letters.
However, I'm not sure how this is indicated.
'of' is the link.
Can you help me to learn more?
(Other definitions for lip that I've seen before include "Insolence (slang)" , "Edge, rim" , "sauciness" , "Fleshy fold of mouth tissue" , "Part of mouth or cheek" .)