RU team's wages finally withdrawn, papers being collected (7)

I believe the answer is:

fifteen

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

'ru team's' is the definition.
'fifteen' can be an answer for 'team's' (I've seen this before). I am not sure about the 'ru' bit.

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for fifteen that I've seen before include "Square root of two hundred and twenty-five" , "XV" , "Rugby Union team" , "Square root of 225" , "No. of men on dead man's chest (Stevenson)" .)

I've seen this clue in The Telegraph.

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.