Judicial decree that makes a police inspector break cover (7)

I believe the answer is:

divorce

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

'judicial decree that makes a police' is the definition.
I can't tell whether this definition defines the answer.

'inspector break cover' is the wordplay.
'inspector' becomes 'di' (detective inspector).
'break' is an anagram indicator.
'cover' anagrammed gives 'vorce'.
'di'+'vorce'='DIVORCE'

Can you help me to learn more?

(Other definitions for divorce that I've seen before include "End one's marriage" , "Ending of marriage" , "Split" , "Permanent separation" , "Break-up" .)

I've seen this clue in the Evening Standard.

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