Actor tried playing king for role in theatre? (3,8)

I believe the answer is:

art director

'role in theatre?' is the definition.
(job in a theatre)

'actor tried playing king' is the wordplay.
'playing' is an anagram indicator.
'king' becomes 'R' (abbreviation for rex, king in Latin).
'actor'+'tried'='actortried'
'actortried' with letters rearranged gives 'artdirecto'.
'artdirecto'+'r'='ART DIRECTOR'

'for' is the link.

(Another definition for art director that I've seen is " setter?".)

I've seen this clue in The Guardian.

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