Crossword Genius

Acquisitive financiers I discovered amongst brokers, wasting time (7)

Ross

I believe the answer is:

raiders

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'acquisitive financiers' is the definition.
The answer and definition can be both people as well as being plural nouns.
Perhaps they are linked in a way I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for raiders that I've seen before include "Marauding attackers" , "Marauders" , "Attacking force" , "' - - of the Lost Ark'" .)

I've seen this clue in The Independent.
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