Do an embellishment for a political leader (5,4)

I believe the answer is:

party boss

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'a political leader' is the definition.
(party boss is a kind of political leader)

'do an embellishment' is the wordplay.
'do' becomes 'party' (I've seen this before).
'an embellishment' becomes 'boss' (I am not sure about this - if you are sure you should believe this answer much more).
'party'+'boss'='PARTY BOSS'

'for' is the link.

Can you help me to learn more?

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

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