Sidechain clicking is probably more to do with having too short a release and too heavy on the threshold and ration.
could also be a problem with the attack, and also what you are sidechaining too might not be hitting on the beat exactly.

anyway.

Obviously I`ve heard this before, so I know what the coup is.

Production wise

where did all the bass go?
there`s no sub on this at all.

Also I feel the breakdown doesn`t really contribute too much to this tune, although I have heard this tune a lot, so I`m used to things, it seems to provide little addition to the progress of this tune other than to fill the requirement of a breakdown.
There`s no build, or drive to keep interest, and it might be a "what do I do now?" moment for the dancefloor.
I`d think about halfing it`s duration.

Things still feel a little dynamically limited, and for a tune as minimal as this, there should be plenty of "air" and space in which the sounds can really puff out their chests.


The main riff does get a little too nagging after a while too, a counter point to it would help to keep interest.

I`d say you`ve overworked this tune, as I know it`s an oldie and has been revised a lot.

my best advice would be to zero the desk, and reset all the EQ`s.

then bring in the main groove (kick, hats, bass), get that sounding big, and clean.
Then really work on the main synth, getting it to fit in the groove nicely.
Then bring in the other elements, cutting them into the mix with EQ.