Answer verified to check deviation (6)
I believe the answer is:
swerve
'deviation' is the definition.
(thesaurus)
'answer verified to check' is the wordplay.
'to check' indicates the answer is hidden within the clue (I've seen 'checks' mean this (check can mean to curb or restrain)).
'SWERVE' can be found hidden inside 'answer verified'.
(Other definitions for swerve that I've seen before include "Suddenly go off course" , "Move aside quickly" , "Turn suddenly aside from a straight course" , "Divergence from course" , "Change course violently" .)