If you mean the clutch slave, it's easy to change but battery box has to be removed for access.
However -
(1) There is a quick release connector under the wheel arch that will almost certainly be corroded solid. You can though just disconnect the hydraulic pipe at the slave cylinder - don't loose the wire clip.
(2) If the clutch is not properly releasing, your problem is more likely to be the master cylinder. The seals wear and air gets drawn in. Bleeding the circuit gives a temporary fix.
Having replaced the slave followed by the master, I think the best option is to replace both as a set. They are not strongly made and repair seals are not available.