Having knowledge (5)
'having knowledge' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for aware that I've seen before include "Cognizant" , "Having knowledge (of fact)" , "Attentive" , "Knowing (of something)" , "well informed" .)
(Other definitions for informed that I've seen before include "Knowledgeable or briefed" , "Passed on knowledge" , "Imparted knowledge" , "Expert" , "Gave knowledge to" .)