A long time ago, my 86 crx clutch pedal squeaked. After about a year or so of it squeaking, the clutch cable mounting bracket broke from the firewall. It was actually the firewall and bracket, that held the clutch cable, moving back and fourth fixing to break that caused my squeaking. No amount of wd-40 would've fixed my problem. Your sqeaking may be caused by something else though. Just letting you know a possibility.