Some toe the line for noble girl (5)

I believe the answer is:

ethel

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

'noble girl' is the definition.
'Ethel' can be an answer for 'girl' (I've seen this before). I am unsure of the 'noble' bit.

'some toe the line' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'ETHEL' is hidden in the letters of 'toe the line'.

'for' is the link.

Can you help me to learn more?

(Other definitions for ethel that I've seen before include "chapel" , "Perhaps a Barrymore" , "Dame - Smyth, Eng. composer, suffragette" , "Lady" , "Dame --- Smyth; William Brown's sister" .)

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