Traces out a wheel (6)
I believe the answer is:
caster
'a wheel' is the definition.
(small wheel attached to a large object)
'traces out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'traces' with letters rearranged gives 'CASTER'.
(Other definitions for caster that I've seen before include "One who throws something" , "Crates with kind of fine sugar" , "Swivelling wheel (E, not O)" , "Small swivelling wheel on furniture" , "Founder; type of 12 Ac" .)