Turn aside from an intended course (7)
I believe the answer is:
deflect
'turn aside from an intended course' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for deflect that I've seen before include "Turn aside from an intended course" , "Cause to go off course" , "Parry, turn aside" , "Turn aside or deviate from course." , "Swerve" .)