Bills found in scores (5)

I believe the answer is:

notes

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

'bills' is the definition.
(I know this)

I don't understand the rest of the clue.

(Other definitions for notes that I've seen before include "registers?" , "fivers?" , "Observes; short comments" , "Short written messages" , "Doh, re, mi, ..." .)

I've seen this clue in The Globe and Mail.

Want a hint initially instead of a full solution? Install my app