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