Crossword Genius

Part of Manhattan is sedate surprisingly (4,4)

Ross

I think it could be either:

Which length description are you looking for?:

8

4,4

east side

'part of manhattan' is the definition.
(I know this)

'is sedate surprisingly' is the wordplay.
'surprisingly' is an anagram indicator (a surprising ordering of the letters).
'is'+'sedate'='issedate'
'issedate' anagrammed gives 'EAST SIDE'.

I've seen this clue in The Guardian.
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