Hint to politicians in the know (5,2)

I believe the answer is:

clued up

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

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

'hint to politicians' is the wordplay.
'hint' becomes 'clue' (synonyms).
'to politicians' becomes 'DUP' (Democratic Unionist Party).
'clue'+'dup'='CLUED-UP'

'in' is the link.

Can you help me to learn more?

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.