Crossword Genius

A brother helped, we’re told (scraped away!) (7)

Ross

I believe the answer is:

abraded

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

'scraped away' is the definition.
(I've seen this in another clue)

'a brother helped we're told' is the wordplay.
I cannot really understand how this works, but
'a' is found in the answer.
'brother' could be 'br' (abbreviation in titles of monks) and 'br' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Another definition for abraded that I've seen is " Worn away".)

I've seen this clue in The Times.
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