Change course and have sides of vegeburger (4)
I believe the answer is:
veer
'change course' is the definition.
(veer off in a different direction)
'sides of vegeburger' is the wordplay.
'sides of' says to hollow out the word (remove centre letters) (only the letters on the sides remain).
'vegeburger' with its middle removed is 'VEER'.
'and have' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for veer that I've seen before include "Swerve" , "Change direction sharply" , "Change direction abruptly" , "Suddenly change direction" , "Turn sharply" .)