Don't pull on ANYTHING yet!! You'll make a mess!
Before proceeding any further with this repair, make sure you have the tools and are capable of bleeding the brake and clutch hydraulic systems. You may be able to perform this without having to bleed the system but, it would be best to be prepared. For more info on bleeding cluch and brake systems, search the forum.
The hose you need to replace runs from the reservoir (where you see it leaking) through the firewall, to the clutch master cylinder. The master cylinder is attached to the clutch pedal assembly and is hidden from view by the valence that is directly over the foot area on the driver's side.
To access the master cylinder, remove the valence (three screws at the top back edge next to the black part of the dash and one other screw/fastener of some sort, above and in front of the parking brake pedal). The master cylinder looks like this:
The hose from the reservoir goes to an angle fitting that is a press fit into the rubber grommet next to the mounting holes on the master cylinder.
Before going any further, remove the floor mats and carpets from the driver's side floor and suction the brake fluid out of the reservoir until it is below the level of the molded-in clutch line nipple. If you remove this line without removing the fluid, you will drain a large part of the contents of the brake reservoir onto the floor of your car.
After the fluid has been removed, pull the hose off of the master cylinder angle fitting (some fluid will drain out of the hose and the cylinder). Then, remove the hose from the reservoir and pull it out through the firewall.
Now, cut the new hose to the same length as the old hose and push it back through the firewall opening. Attach it to the master cylinder angle fitting and then to the reservoir nipple.
Refill the reservoir with new brake fluid and bleed the system.
Test clutch operation
Check for leaks. Clean any spilled fluid and replace mats/carpets.