Essentially sell off pint of Sprite? (5)

I believe the answer is:

elfin

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'sprite?' is the definition.
(I have seen 'Mischievous sprite' mean 'elfin' so perhaps 'sprite' could also mean 'elfin')

'essentially sell off pint' is the wordplay.
'essentially' indicates the central letters.
'off pint' becomes 'fin' (I am not sure about this - if you are sure you should believe this answer much more).
The middle letters of 'sell' are 'el'.
'el'+'fin'='ELFIN'

'of' is the link.

Can you help me to learn more?

(Other definitions for elfin that I've seen before include "Small, mischievous and charming" , "Delicately framed" , "Like a tiny fairy" , "Small and fragile" , "Spritely" .)

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

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