Got into trouble and weren't allowed to remain adherents? (4,7)

I believe the answer is:

came unstuck

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'weren't allowed to remain adherents?' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'got into trouble' is the wordplay.
'got' becomes 'came' (coming is a kind of getting).
'into trouble' becomes 'unstuck' (I can't explain this - if you can you should believe this answer much more).
'came'+'unstuck'='CAME UNSTUCK'

'and' is the link.

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