Celebrity of note — yours truly (4)
I believe the answer is:
fame
'celebrity' is the definition.
(celebrity can mean the quality of being famous)
'note yours truly' is the wordplay.
'note' becomes 'fa' (musical note).
'yours truly' becomes 'me' (the person who set this crossword).
'fa'+'me'='FAME'
'of' acts as a link.
(Other definitions for fame that I've seen before include "Musical - stardom" , "Renown, celebrity" , "Favourable public reputation" , "Celebrity; stage musical" , "Notoriety or celebrity" .)