Flourish with healthy meal (8)
I believe the answer is:
brandish
'flourish' is the definition.
(I know that flourish can be written as brandish)
'healthy meal' is the wordplay.
'healthy' becomes 'bran' (I can't justify this - if you can you should give a lot more credence to this answer).
'meal' becomes 'dish' (a dish is a particular meal).
'bran'+'dish'='BRANDISH'
'with' acts as a link.
Can you help me to learn more?
(Other definitions for brandish that I've seen before include "Flourish (a weapon)" , "Wave like a weapon" , "shake" , "Wield or wave belligerently" , "Wave as a threat" .)