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Hmm I've looked at a few guides to service shimano clutches, none of them mention locktite. There was no locktite breaking crack when I disassembled either. There's a roller bearing that sits on the outside of the p-axle, that the clutch pushes down on when engaged. I assume it isn't working properly and that's why it is tightening. I just don't know what has caused it to stop working.
The solution here may well also be Loctite - disassembly would've significantly reduced the effectiveness of any factory compound. Assuming of course there isn't a proper locknut or something you've missed. You can tell I know fuck-all about derailer clutches