Celebrity of Nevada city, extremely well-known (6)
I believe the answer is:
renown
'celebrity' is the definition.
(I know that celebrity can be written as renown)
'nevada city extremely well-known' is the wordplay.
'nevada city' becomes 'reno' (I've seen this in another clue).
'extremely' means to remove the middle letters (only the extremes of the word are used).
'well known' becomes 'well-known' (synonyms).
'wellknown' with its middle taken out is 'wn'.
'reno'+'wn'='RENOWN'
'of' acts as a link.
(Other definitions for renown that I've seen before include "Plane's maximum width" , "Fame and distinction" , "High repute" , "Fame and eminence" , "Celebrity, fame" .)