Watchful (5)
'watchful' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aware that I've seen before include "Conscious, knowing about" , "Cognizant" , "Acquainted with or conscious of" , "Bearing in mind" , "Having knowledge of, informed" .)
'watchful' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for alert that I've seen before include "Wide-awake and watchful" , "Watchful and bright" , "Vigilantly attentive" , "Vigilant - warning" , "Watchful, sharp" .)
'watchful' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for awake that I've seen before include "Unable to sleep" , "Rouse; vigilant" , "Alive and alert" , "Patriotic song 'The West's .....'" , "Come to" .)
'watchful' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for vigilant that I've seen before include "Carefully observant or attentive" , "On the lookout" , "Keeping careful watch" , "Watchful, alert to possible danger" , "Watchful, on guard" .)
'watchful' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for observant that I've seen before include "Keen-eyed" , "aware of surroundings" , "Quick at noticing things, attentive" , "attentive to detail" , "Closely watching" .)