Chain tension and tensioning a chain

My chain makes a sort of clicking sound as it makes contact with the rear cog and it gets kind of annoying when im riding, is this normal? Im asking here because my chain quite tight but i cant take out a link because the drop outs are too short/chainstays are too long.

What Nimbus said, get a smaller rear sprocket to increase you chain length.
This should reduce the noise you are getting from the apparent overly tight chain.