Financier doesn't start down (5)

I believe the answer is:

under

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'down' is the definition.
(under means further down)

I don't understand how the rest of the clue works.

(Other definitions for under that I've seen before include "Dylan Thomas radio play ''.... Milk Wood''" , "See 16 Down" , "'Beneath, below (5)'" , "Beneath or subordinate to" , "In a state of unconsciousness" .)

I've seen this clue in The Irish Times.

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