Cute king is black (8)
I believe the answer is:
kissable
'cute' is the definition.
Both the definition and answer are adjectives.
Perhaps you can see a link between them that I don't see?
'king is black' is the wordplay.
'king' becomes 'K' (abbreviation for king in chess).
'black' becomes 'sable' (heraldic term for black).
'k'+'is'+'sable'='KISSABLE'
Can you help me to learn more?
(Other definitions for kissable that I've seen before include "Dishy" , "asking to be bussed?" , "Rather alluring" .)