Actually Sunscreem in disguise. In 1994, the band released a series of 12" tracks using a series of pseudonymns (including 'Anna Din' - genius). Sasha used 'XS' in one of the first Essential Mixes in early 1994. For years I only had a bootleg tape recording to listen to. It survived many a tape taffle, which I managed to unravel and selotape back up to live another day. - anyone else do stuff like that...?
Anyway, I eventually managed to buy a decent copy of the track, and what a difference it makes. For those of you who recognise the riff, it was also used on TC 1992's track 'Funky Guitar'.