That's the accelerating shoes of the clutch then that you are looking for and the common name of what you'll find them listed for in the USA (and what most people will know them by). The starter clutch shoes are located below that housing and are what most people will think of when people are looking for a clutch:
If you attempt to access the starter shoes (clutch shoes) you will need a (I believe) 15 x 24 x 7 oil seal to replace the one you pull.
I'll dig around and see if I still have an old set but they might be glassed over. (edited)