Crossword Genius

Warm-up act (6)

Ross

I believe the answer is:

'warm-up act' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for opener that I've seen before include "(Team's) first batsman" , "Card player who starts the bidding" , "In cricket, a batsman who plays the first ball of an innings" , "number one or two?" , "First going in to bat" .)

I've seen this clue in the Newsday, the LA Times and The New York Times.
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