Crossword Genius

OK, what might a flea-ridden bear get in winter? (2,2,7)

Ross

I believe the answer is:

up to scratch

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

'ok' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for up to scratch that I've seen before include "OK" , "Adequate" , "good enough?" , "Of the required standard" .)

I've seen this clue in The Independent.
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.