Greatly charm a girl in a foolish way (6)

I believe the answer is:

ravish

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'greatly charm' is the definition.
'ravish' can be an answer for 'charm' (thesaurus). I'm unsure of the 'greatly' bit.

'a girl in a foolish way' is the wordplay.
'a girl' becomes 'Vi' (short for Violet).
'in' indicates putting letters inside.
'a foolish way' becomes 'rash' (I can't explain this - if you can you should give a lot more credence to this answer).
'vi' put within 'rash' is 'RAVISH'.

Can you help me to learn more?

(Other definitions for ravish that I've seen before include "Seize and carry off" , "Transport with delight" , "Enrapture - sexually assault" , "Seduce" , "Enchant" .)

I've seen this clue in the Evening Standard.

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