Attentive, observant (7)
I believe the answer is:
heedful
This clue is a double definition.
'attentive' is the first definition.
(heedful can mean listening or paying attention)
'observant' is the second definition.
(thesaurus)
(Other definitions for heedful that I've seen before include "Attentive, listening carefully" , "Paying careful attention" , "Cautious" , "Attentive - circumspect" , "Prudent" .)