Gnome circling wood, moving casually (9)
I believe the answer is:
sashaying
'moving casually' is the definition.
(to sashay is to walk casually)
'gnome circling wood' is the wordplay.
'gnome' becomes 'saying' (gnome can mean a saying or adage).
'circling' indicates putting letters inside (circling can mean going around or containing).
'wood' becomes 'ash' (wood from an ash tree).
'saying' going around 'ash' is 'SASHAYING'.
(Other definitions for sashaying that I've seen before include "making casual progress" , "Walking in an ostentatious manner" .)