turned out to be the freewheel being on its last legs - teeth were a bit worn and externally looked fine, but internals were shot which meant there was a bit of play, hence the creaking/clicking. The new ENO I have on there made a huge difference (old one was a Halo clickster)
https://www.lfgss.com/conversations/293649/#comment13253455 separate thread about my SS drivetrain clicking and creaking.
turned out to be the freewheel being on its last legs - teeth were a bit worn and externally looked fine, but internals were shot which meant there was a bit of play, hence the creaking/clicking. The new ENO I have on there made a huge difference (old one was a Halo clickster)