Crossword Genius

Gratefully acknowledged (7)

Ross

I believe the answer is:

thanked

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

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

Can you help me to learn more?

(Other definitions for thanked that I've seen before include "Acknowledged" , "shown gratitude" , "Expressed gratitude" .)

I've seen this clue in The Globe and Mail.
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