Way off base (6)
I believe the answer is:
errant
(Other definitions for errant that I've seen before include "Offending" , "Travelling about or going astray" , "so some knights are called" , "Straying from the right course" , "Roving" .)
I believe the answer is:
errant
(Other definitions for errant that I've seen before include "Offending" , "Travelling about or going astray" , "so some knights are called" , "Straying from the right course" , "Roving" .)