Ardently and avidly (7)
I believe the answer is:
eagerly
'ardently and avidly' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for eagerly that I've seen before include "Ardently and avidly" , "Keenly" , "Fervently" , "Showing impatience" , "Enthusiastically" .)