Eagerly or sharply (6)
I believe the answer is:
keenly
I believe this clue is a double definition.
'eagerly' is the first definition.
(I've seen this before)
'sharply' is the second definition.
(thesaurus)
(Other definitions for keenly that I've seen before include "Eagerly, sharply" , "With enthusiasm" , "In an eager manner" , "With eagerness" , "Eagerly, enthusiastically" .)