Spite, that’s about right – leading to appeal (10)
I believe the answer is:
prettiness
'spite' is the definition.
The definition and answer can be both human attributes as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'about right leading to appeal' is the wordplay.
I cannot quite see how this works, but
'about' could be 're' ('re' means regarding or about) and 're' is found within the answer.
'leading' could be 'in' (in government) and 'in' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for prettiness that I've seen before include "1 across (anag)" , "Attractive quality" , "13 [ATTRACTIVE] state" .)