Celebrity appearing in satire, now nervous (6)
I believe the answer is:
renown
'celebrity' is the definition.
('renown' can be a synonym of 'celebrity')
'in satire now nervous' is the wordplay.
'in' indicates the answer is hidden within the clue.
'RENOWN' can be found hidden inside 'satire now nervous'.
'appearing' is the link.
(Other definitions for renown that I've seen before include "High repute" , "Plane's maximum width" , "Celebrity, fame" , "Good reputation" , "Fame and distinction" .)