Cub shedding coat with fur fit for purpose (6)
I believe the answer is:
usable
'fit for purpose' is the definition.
(I've seen this before)
'cub shedding coat with fur' is the wordplay.
I cannot quite understand how this works, but
'coat' could be 'sable' (sable coat is a kind of coat) and 'sable' is located in the answer.
A single letter 'u' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for usable that I've seen before include "Of potential utility" , "Fit for employment" , "Fit for purpose" , "fit to wear" , "Functional, handy" .)