Famous incompetent (7)
I believe the answer is:
notable
This might be a double definition.
'famous' is the first definition.
(synonyms)
'incompetent' is the second definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
Can you help me to learn more?
(Other definitions for notable that I've seen before include "Impressive" , "Star" , "Ton bale (anag.)" , "Worthy of record" , "Unusual" .)