Crossword Genius

Run out of energy (4)

Ross

I believe the answer is:

tire

'run out of energy' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for tire that I've seen before include "Become exhausted" , "Flag" , "Feel in need of rest" , "Exhaust" , "Wear out" .)

I've seen this clue in the Newsday and the USA Today.
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