Flits with dashing young men around small Roman square (10)

I believe the answer is:

gallivants

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'flits with dashing young men' is the definition.
The answer and definition can be both to do with motion as well as being verbs in their -s form.
Maybe they are linked in a way I don't understand?

'around small roman square' is the wordplay.
'around' is an insertion indicator.
'small' becomes 'gallants' (I can't explain this - if you can you should give a lot more credence to this answer).
'roman square' becomes 'IV' (Roman numerals for four, a square number).
'gallants' going around 'iv' is 'GALLIVANTS'.

Can you help me to learn more?

I've seen this clue in The Guardian.

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