It allows you to be saucy about Military Intelligence (6)

I believe the answer is:

permit

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

'it allows you to' is the definition.
The definition suggests a singular noun which matches the answer.

'saucy about military intelligence' is the wordplay.
'saucy' becomes 'pert' (synonyms).
'about' indicates putting letters inside.
'military intelligence' becomes 'MI' (as in MI5 or MI6 - British military intelligence).
'pert' placed around 'mi' is 'PERMIT'.

'be' acts as a link.

Can you help me to learn more?

(Other definitions for permit that I've seen before include "Let - pass" , "Official document giving authorisation" , "Allow, authorise" , "Licence -- license" , "Officially allow" .)

I've seen this clue in the Evening Standard.

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.