OK, if needs must! (4,4)

I believe the answer is:

very well

(Other definitions for very well that I've seen before include "Blooming" , "Better than just OK" , "Phrase indicating compliance or assent" , "If you insist" , "Enjoying great health" .)

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.