Alter (anag.) (5)
I believe the answer is:
alert
(Other definitions for alert that I've seen before include "Quick to notice" , "Watchfully awake" , "Vigilantly attentive" , "On the ball" , "sharp-witted" .)
I believe the answer is:
alert
(Other definitions for alert that I've seen before include "Quick to notice" , "Watchfully awake" , "Vigilantly attentive" , "On the ball" , "sharp-witted" .)