Promote variety of vegetables, but not garlic, shallots and broccoli to begin with (7)
I believe the answer is:
elevate
'promote' is the definition.
('elevate' can be a synonym of 'promote')
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for elevate that I've seen before include "Lift - exalt - promote - cheer" , "Raise high or promote" , "Raise to a higher position" , "Raise, exalt (in rank)" , "Put on a pedestal" .)