Licit operators in action? Not at all! (7,7)

I believe the answer is:

capitol rioters

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

'not at all' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'licit operators in action?' is the wordplay.
'in action?' indicates an anagram (I've seen this in other clues).
'licit'+'operators'='licitoperators'
'licitoperators' is an anagram of 'CAPITOL RIOTERS'.

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.