Crossword Genius

Keeping to the act? (3-7)

Ross

I believe the answer is:

law-abiding

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

'keeping to' is the definition.
I can't tell whether this definition defines the answer.

'act?' is the wordplay.
I cannot quite see how this works, but
'act?' could be 'din' (din is a kind of act) and 'din' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

'the' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish Independent.
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