Indian lute, one held by celebrity (5)
I believe the answer is:
sitar
'indian lute' is the definition.
(I've seen this before)
'one held by celebrity' is the wordplay.
'one' becomes 'i' (Roman numeral).
'held by' means one lot of letters goes inside another.
'celebrity' becomes 'star' (I've seen this before).
'i' put into 'star' is 'SITAR'.
(Other definitions for sitar that I've seen before include "Lasting from morning to night" , "instrument out east" , "Long necked and often plucked" , "music producer" , "Plucked instrument" .)