Crossword Genius

Some schooling for a hundred girls (7)

Ross

I believe the answer is:

classes

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

'some schooling for a' is the definition.
I can't tell whether this defines the answer.

'hundred girls' is the wordplay.
'hundred' becomes 'c' (Roman numeral).
'girls' becomes 'lasses' (lass can mean a girl).
'c'+'lasses'='CLASSES'

Can you help me to learn more?

(Other definitions for classes that I've seen before include "Categories" , "See 1" , "Groups with the same social or economic status" .)

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