Crossword Genius

Where parts are put together for collecting? (8,5)

Ross

I believe the answer is:

assembly rooms

I'm a little stuck... Click here to teach me more about this clue!

'put together for collecting?' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'where parts' is the wordplay.
I cannot really see how this works, but
'parts' could be 'assembly' (I have seen 'Parts of machine' mean 'assembly' so perhaps 'parts' could also mean 'assembly') and 'assembly' is found in the answer.
The remaining letters 'rooms' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'are' is the link.

Can you help me to learn more?

(Another definition for assembly rooms that I've seen is " Meeting hall".)

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