Kitty to stream revolutionary Irish medley (9)
I believe the answer is:
potpourri
'medley' is the definition.
(I know that medley can be written as potpourri)
'kitty to stream revolutionary irish' is the wordplay.
'kitty' becomes 'pot' (both can mean a shared fund).
'to stream' becomes 'pour' ('pour' can be a synonym of 'stream').
'revolutionary' says the letters should be written in reverse (letters revolve around).
'irish' becomes 'IR' (abbreviation for Irish).
'ir' backwards is 'ri'.
'pot'+'pour'+'ri'='POTPOURRI'
(Other definitions for potpourri that I've seen before include "Mixture of dried, scented items" , "A medley of popular tunes" , "Scented petals and spices" , "Dried petals for scent" , "hodgepodge" .)