Possible Clues:

• Square-__ (sailing ship)
• 'Long, pointed brush used by artists (6)'
• Scaffolding worker
• Oil worker offshore with voice of severity
• Pronounced hardship for man working on vessel
• Scaffolder's prompt -- taking roof off
• Sailor, sometimes
• Needs no introduction to set it in motion for sailor
• Square-___ (sailing ship)
• Sailing ship; fraud