By the way, you'll find one broken and set out (9)
I believe the answer is:
kerbstone
'by the way you'll find one' is the definition.
(stone by a way or street)
'broken and set out' is the wordplay.
'and' is a charade indicator (letters next to each other).
'out' indicates an anagram (out can mean wrong or inaccurate).
'broken' after 'set' is 'setbroken'.
'setbroken' is an anagram of 'KERBSTONE'.
(Other definitions for kerbstone that I've seen before include "Pavement edging block" , "that's set by the road" , "edging for flags?" , "Pavement edge" .)