Turn or plunge to the right (6)
I believe the answer is:
divert
'turn' is the definition.
(diverting is a kind of turning)
'plunge to the right' is the wordplay.
'plunge' becomes 'dive' (synonyms).
'to the right' becomes 'rt'.
'dive'+'rt'='DIVERT'
'or' acts as a link.
(Other definitions for divert that I've seen before include "Amuse, or turn from normal course" , "Find a different way" , "Amuse or send another way" , "Entertain; reroute" , "Capture attention of" .)