Revolutionary woman and good girl give cause for reflection? (6,5)

'cause for reflection?' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'revolutionary woman and good girl' is the wordplay.
'revolutionary woman' becomes 'cheval' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'and' is a charade indicator (letters next to each other).
'good' becomes 'g' (abbreviation).
'girl' becomes 'lass' (lass can informally mean a girl).
'cheval'+'g'+'lass'='CHEVAL-GLASS'

'give' is the link.

Can you help me to learn more?