Crossword Genius

An up-and-down performance (3)

Ross

I believe the answer is:

gig

'performance' is the definition.
(a gig is a musical concert)

I don't understand the rest of the clue.

(Other definitions for gig that I've seen before include "Date" , "One-night stand" , "A one-night entertainment" , "Band performance" , "Perform live < in boat" .)

I've seen this clue in The Times.
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