Crossword Genius

Could be nine seas in tumult (2,1,5)

Ross

I believe the answer is:

in a sense

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'could be nine seas in tumult' is the definition.
I can't judge whether this defines the answer.

'could be nine seas' is the wordplay.
'could be' indicates an anagram.
'nine'+'seas'='nineseas'
'nineseas' is an anagram of 'IN A SENSE'.

Can you help me to learn more?

(Other definitions for in a sense that I've seen before include "After a fashion" , "To some extent" , "According to one possible interpretation" .)

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