Crossword Genius

Provided backup, in a way (4)

Ross

I believe the answer is:

sang

'provided backup in a way' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for sang that I've seen before include "Made music with the voice" , "Chanted" , "Celebrated" , "Chinese organ" , "Did numbers" .)

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