Hi Deni, that clutch hose looks very much like one from an MG Midget -
https://www.ebay.co.uk/itm/MG-Midget...MAAOxymxFRnXEI
You can either just use a new Midget one or replace the whole thing, connectors and all, with a copper/kunifer one for a Spitfire/Herald, and both solutions are likely to be more reliable than trying to adapt a brake hose.