Veer (6)
'veer' is the definition.
(I know that veer can be written as swerve)
This is all the clue.
(Other definitions for swerve that I've seen before include "Suddenly deviate from straight course" , "Suddenly go off course" , "try to avoid" , "Suddenly move off course" , "Turn aside from straight course to avoid something (6)" .)
'veer' is the definition.
(I know that yaw is a more specific form of the action the veer)
This is the entire clue.
(Other definitions for yaw that I've seen before include "Deviation (of e.g. ship)" , "Ship's deviation" , "Go off course" , "Twisting motion (of ship)" , "(Of ship) twist sideways" .)