Crossword Genius

Ducks from thrown boomerang (7)

Ross

I believe the answer is:

bergman

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'boomerang' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see an association between them that I don't see?

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

Can you help me to learn more?

(Other definitions for bergman that I've seen before include "Ingmar ---, director; Ingrid ---, actress" , "Ingrid -, Swedish actress (Casablanca)" , "Female star of the 1942 film Casablanca, d.1982" , "6 24 113 [SCAN-DIN-AVIAN] filmmaker" , "Film people Ingmar and Ingrid" .)

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