Says no more and finishes dressing (7,2)

I believe the answer is:

buttons up

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

'finishes dressing' is the definition.
'buttons up' can be an answer for 'finishes' (I've seen this in another clue). I am unsure of the 'dressing' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

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.