With expertise (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
ably
'with expertise' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ably that I've seen before include "well" , "Competently" , "Masterfully" , "In capable manner" , "In a competent fashion" .)