Crossword Genius

Occupation on list unions organised here? (8,6)

Ross

I believe the answer is:

registry office

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

'organised here?' is the definition.
The definition suggests a singular noun which matches the answer.

'occupation on list unions' is the wordplay.
'occupation' becomes 'office' (office is a kind of occupation).
'on' says to put letters next to each other.
'list unions' becomes 'registry' (I can't justify this - if you can you should give a lot more credence to this answer).
'office' after 'registry' is 'REGISTRY OFFICE'.

Can you help me to learn more?

(Another definition for registry office that I've seen is " Place for union".)

I've seen this clue in The Independent.
Want a hint initially instead of a full solution? Install my app