Celebrity panel is right (9)
I believe the answer is:
starboard
'is right' is the definition.
(right side of a ship)
'celebrity panel' is the wordplay.
'celebrity' becomes 'star' (I've seen this before).
'panel' becomes 'board' ('board' can be a synonym of 'panel').
'star'+'board'='STARBOARD'
(Other definitions for starboard that I've seen before include "right to 14 [YACHTS]" , "Right side at sea" , "Right-hand side of ship while facing forward" , "Right side of ship or plane" , "Literally, the steering side of a vessel" .)