I deliver the best possible (5)

I believe the answer is:

ideal

I'm a little stuck... Click here to teach me more about this clue!

'best possible' is the definition.
(I've seen this in another clue)

'i deliver' is the wordplay.
'deliver' becomes 'deal' (I can't justify this - if you can you should believe this answer much more).
'i'+'deal'='IDEAL'

'the' acts as a link.

Can you help me to learn more?

(Other definitions for ideal that I've seen before include "Utopian; yardstick" , "without flaws" , "Model of perfection" , "highly desirable" , "Benchmark" .)

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

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