Crossword Genius

No fur seal should be disturbed (7)

Ross

I believe the answer is:

refusal

I'm a little stuck... Click here to teach me more about this clue!

'no' is the definition.
(refusing is saying no)

'fur seal should be disturbed' is the wordplay.
'fur seal' can be anagrammed to 'REFUSAL'.
But, I'm not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for refusal that I've seen before include "Negation" , "Act of a horse stopping short at a jump" , "The act of saying no" , "Chance to decline" , "regrets?" .)

I've seen this clue in The Telegraph.
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