Possible Clues:

• Stroke for artist returning to straight and narrow
• — Motor; — equation
• One left turning, bordering on straight
• Sequential, as thinking
• It's supposed to lead directly to artist coming back from straight and narrow perhaps
• Involving one dimension only
• At home in tragic role involving one dimension only
• In a row boat, grasping second of paddles
• One-dimensional words disheartened Antenor
• Totally straight- haha, why?