Mum uses sources in places displaying objects of lasting interest (7)

I believe the answer is:

museums

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'places displaying objects of lasting interest' is the definition.
I can't judge whether this defines the answer.

'mum uses sources' is the wordplay.
'sources' indicates anagramming the letters (I've seen 'source of' mean this).
'mum'+'uses'='mumuses'
'mumuses' anagrammed gives 'MUSEUMS'.

'in' is the link.

Can you help me to learn more?

(Other definitions for museums that I've seen before include "Places like the V&A" , "Sue's mum (anag.)" , "Louvre and V&A?" .)

I've seen this clue in the Sydney Morning Herald.

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