Assuming you mean the clutch slave cylinder
Not that bad -
bleed clutch system dry
remove hose from either end
remove circlip (snap ring)
should pull out - ha, may of corroded and "welded" itself to the housing, use WD40 etc - give it a good soaking for 24 hours or so if required gently warm
sources - not sure where you are, For Europe Walloth & Hesch Germany, Jaymic uk etc
Malc