Cover that's very easy to slip on (6,4)
I believe the answer is:
banana skin
'very easy to slip on' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'cover' is the wordplay.
I cannot quite see how this works, but
'cover' could be 'skin' (skin is a kind of cover) and 'skin' is present in the answer.
The remaining letters 'banana' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for banana skin that I've seen before include "Potential source of slip-up" , "Something to slip up on" , "that could lead to one's downfall" , "pedestrian problem" , "potential trouble" .)