Crossword Genius

Whispers “Ulster’s free!” (7)

Ross

I believe the answer is:

rustles

'whispers' is the definition.
('rustle' can be a synonym of 'whisper')

'ulster's free' is the wordplay.
'free' indicates anagramming the letters.
'ulsters' is an anagram of 'RUSTLES'.

(Another definition for rustles that I've seen is " Steals cattle or sounds like ulsters".)

I've seen this clue in The Hindu.
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