I have a 93 UK Civic LSi and the clutch has a 'dry creak' exactly the
same as this video - http://uk.youtube.com/watch?v=PNfp83Od_c4 . I
think it's coming from inside the clutch housing itself, not the slave
cylinder. I've sprayed all over the slave cylinder push rod end with
WD40 and stuff and it makes no difference.

Am I right in thinking it's the clutch release bearing - is there any
way of lubricating it without taking the clutch apart or getting any
lubricant on the clutch plates?

Cheers.