There's a bleed valve on the slave cylinder (near front of gearbox on passenger side). it is a wee nipple that you can loosened with a spanner (6mm or 8mm I think from memory). Much easier with 2 people.
Loosen, depress clutch, tighten, release clutch and repeat ensuring reservoir is kept topped up. Have a container to catch the fluid - It is quite caustic and if left on concrete will damage a nice floated finish, and will definitely wreck your paint.