Enthusiastic to have flavour almost rounded out (7)

I believe the answer is:

zestful

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'enthusiastic' is the definition.
(I've seen this before)

'flavour almost rounded out' is the wordplay.
'flavour' becomes 'zest' (I've seen this before).
'almost rounded out' becomes 'ful' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'zest'+'ful'='ZESTFUL'

'to have' is the link.

Can you help me to learn more?

(Other definitions for zestful that I've seen before include "Full of relish" , "Energetic, piquant" , "Vibrant" , "Enthusiastic" , "Keen - piquant" .)

I've seen this clue in the Sydney Morning Herald.

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