Latent qualities are possible (9)
I believe the answer is:
potential
This clue could be a double definition.
'latent' is the first definition.
(similar in meaning)
'possible' is the second definition.
(synonyms)
'qualities are' acts as a link.
I am not very happy about this link. Some or all of it may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for potential that I've seen before include "Inherent capacity not realised" , "Latent abilities that may be developed" , "Latent, not yet actual" , "Budding" , "Latent talent" .)