1) Added Hydrogen by mistake for the third album but still sounded the same. - Jo(h)n Anderson.
2) Angel after decrease. - Peter Gabriel
3) Vicious dean comes about fruit.
4) This songbirds got sheep? Sounds like it! - Annie Haslam
5) Kith and Kin.
6) Moved away to start a different job.
7) Sings like he's just got off a long journey by air. - Bernado Lanzatti
8) Maybe he should have been Swiss. No! There would be an eruption. - Thijs van Leer
9) Dick and his ZX. - Richard Sinclair

Absolutely correct with the last two Rick.

van Leer is notable for his yodelling (Swiss) and focus recorded the track "Eruption"

Dick (abreviation for Richard) and Sinclair manufactured the popular, at the time, ZX znd ZX Spectrum home computers.

Jim 4 Rick 2

Of the other 3. One is an anagram type clue. One clue leads directly to a band and hence the singer in that band and the last clue when translated leads directly to a song title by this singer.

Give it another shot Rick. You can still win.