Most actors probably hope for it (3,4,4)

I believe the answer is:

the best part

I believe this is a double definition.

'most' is the first definition.
(I've seen this before)

'actors probably hope for it' is the second definition.
(I've seen this before)

(Another definition for the best part that I've seen is " actors probably hope for it".)

I've seen this clue in The Globe and Mail.

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