Keen (5)

'keen' is the definition.
(I know that keen can be written as sharp)
This is all the clue.
(Other definitions for sharp that I've seen before include "Cutting; note" , "Incisive" , "music feature" , "Good cutting edge or acute road turn" , "Bitter" .)
'keen' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for eager that I've seen before include "Alert and active type?" , "Enthusiastic, avid" , "Excited by desire" , "It's a bore" , "Earnest" .)
'keen' is the definition.
(I know that keen can be written as acute)
This is the entire clue.
(Other definitions for acute that I've seen before include "Shrewd; severe" , "Urgently pressing" , "Extremely sharp or intense" , "feature at the beginning and end of a French summer" , "Sharp as of mind - or pain" .)
'keen' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for avid that I've seen before include "Keen and eager" , "'Eager, zealous (4)'" , "Greatly desirous" , "Showing active interest and enthusiasm" , "Keenly interested" .)
'keen' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for agog that I've seen before include "with eyes on stalks" , "Excitedly interested" , "Bug-eyed" , "Expecting" , "Eager and wide-eyed" .)
'keen' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ardent that I've seen before include "Burning with emotion" , "Very keen" , "Enthusiastic, eager" , "passion" , "Intensely enthusiastic" .)
'keen' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for red-hot that I've seen before include "The rod (anag.)" , "Glowing with a high temperature" , "(Of information) very recently received" , "Flower (just out of the fire?)" , "Glowing; passionate" .)