Possible Clues:

• British landscape painter - US rock singer, Tina
• Lathe worker; a water-colourist
• J.M.W. -, artist
• That was a revolutionary with the brush
• Lathe operator and English painter
• Fighting Temeraire artist
• Painter might appear a twister
• This 18 across might be the one to 3 down
• Did he not go straight into art?
• The artist needs to be fitter to work with 23 across