"Clean" is relative. I don't think there's much point getting hung up on this because waste is a fact of life, but if the sell is no waste, fusion can't do that: tritium, especially after intense neutron bombardment is a known biohazard and the whole point of fusion is the energy levels and the associated intense neutron density.

There will be irradiated products. There will be a waste stream. Deuterium is needed too.

Less than fission per unit energy delivered? Hopefully.

I'd have gone with "cleaner", perhaps. I'm personally more interested in renewables which are less intense energy but more immediately tractable. But watching fusion inch (sorry, improper use of imperial measure. 2.5 centimetre) forward in time is fascinating.