A performer in the part is temperamental (7)

I believe the answer is:

artiste

'a performer' is the definition.
(an artiste is a performer or entertainer)

'in the part is temperamental' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ARTISTE' can be found hidden inside 'part is temperamental'.

(Other definitions for artiste that I've seen before include "Player" , "Person playing" , "Tears it (anag.)" , "One entertaining" , "Performers" .)

I've seen this clue in The Irish News.

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