The way to confuse a setter (6)
I believe the answer is:
street
'the way' is the definition.
(street is a kind of way)
'confuse a setter' is the wordplay.
'confuse' indicates an anagram.
'setter' with letters rearranged gives 'STREET'.
'to' acts as a link.
(Other definitions for street that I've seen before include "Somerset town; urban way" , "Way; setter (anag.)" , "Part of motorist's route" , "Tester in public road" , "Roadway" .)