Crossword Genius

Fully caffeinated, say (5)

Ross

I believe the answer is:

alert

'fully caffeinated say' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for alert that I've seen before include "Warning signal" , "Wide awake and watchful" , "Watchful; warning" , "Watchful and observant" , "Vigilantly attentive" .)

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