Frolickin' round Rhode Island with southern roughs (9)

I believe the answer is:

larrikins

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'roughs' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'frolickin' round rhode island with southern' is the wordplay.
'frolickin'' becomes 'larkin'' ('larking' pronounced like 'frolicking' was; 'lark' can be a synonym of 'frolic').
'round' indicates putting letters inside.
'rhode island' becomes 'RI' (US postal abbreviation).
'with' says to put letters next to each other.
'southern' becomes 's' (abbreviation).
'larkin' enclosing 'ri' is 'larrikin'.
'larrikin'+'s'='LARRIKINS'

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(Another definition for larrikins that I've seen is " hooligans".)

I've seen this clue in the Sydney Morning Herald.

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