Crossword Genius

Jack in opera is excellent (5)

Ross

I believe the answer is:

raise

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

I don't understand the remainder of the clue.

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(Other definitions for raise that I've seen before include "Bring up - an increase in pay" , "Uplift" , "Lift; (to) levy (money)" , "Call up" , "Exalt" .)

I've seen this clue in The Sun.
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