Crossword Genius

Very good police getting star? (3,3,4)

Ross

I believe the answer is:

top the bill

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

'very good' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'police getting star?' is the wordplay.
'police' becomes 'thebill' (informal UK term for the police).
'getting' says to put letters next to each other.
'star?' becomes 'top' (I can't justify this - if you can you should believe this answer much more).
'thebill' put after 'top' is 'TOP THE BILL'.

Can you help me to learn more?

I've seen this clue in The Telegraph.
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