Crossword Genius

"Drum!", some complain forcefully (4)

Ross

I believe the answer is:

info

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'drum' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

'some complain forcefully' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'INFO' can be found hidden inside 'complain forcefully'.

Can you help me to learn more?

(Other definitions for info that I've seen before include "Knowledge provided" , "Gen (colloq.)" , "counsel?" , "Facts (abbr)" , "What's known" .)

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