Unspecified object: hang it loosely round nanny's shoulders (8)

I believe the answer is:

anything

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'unspecified object' is the definition.
(I've seen this before)

'hang it loosely round nanny's shoulders' is the wordplay.
'loosely' is an anagram indicator.
'round' means one lot of letters goes inside another.
'nanny's shoulders' becomes 'ny' (I can't explain this - if you can you should believe this answer much more).
'hang'+'it'='hangit'
'hangit' is an anagram of 'athing'.
'athing' going around 'ny' is 'ANYTHING'.

Can you help me to learn more?

(Other definitions for anything that I've seen before include "------- Goes, Cole Porter musical" , "Musical by 14" , "- - Goes (mus.)" , "Musical - statement of permissiveness" , ""Whatever!"" .)

I've seen this clue in The Telegraph.

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