Quickly and skilfully (8)
I believe the answer is:
adroitly
'quickly and skilfully' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for adroitly that I've seen before include "With skill and subtlety" , "in masterly fashion" , "Idolatry (anag) -- with skill" , "With skill - dilatory (anag)" , "far from clumsily" .)