Bustle engulfed in shadow (3)

I believe the answer is:

ado

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'bustle engulfed in shadow' is the definition.
'ado' can be an answer for 'bustle' (I've seen this in another clue). I'm unsure of the 'engulfed in shadow' bit.

'in shadow' is the wordplay.
'in' says the answer is hidden in the clue.
'ADO' can be found hidden inside 'shadow'.

Can you help me to learn more?

(Other definitions for ado that I've seen before include "agitation" , "flapping" , "carry-on" , "Flap" , "Nothing caused much around 1598" .)

I've seen this clue in The Mirror.

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