Ring round after entrance to find where you can go (8)

I believe the answer is:

portaloo

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'find where you can go' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'ring round after entrance' is the wordplay.
'ring round' becomes 'aloo' (I can't explain this - if you can you should believe this answer much more).
'after' is a charade indicator (letters next to each other).
'entrance' becomes 'port'.
'aloo' put after 'port' is 'PORTALOO'.

'to' is the link.

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I've seen this clue in The Guardian.

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