Possible Clues:

• Flout Dub, being undecided
• Unlikely, questionable
• Unsettled in mind or opinion
• Unlikely description of Thomas
• Certain people cannot be so described
• Hard to believe
• Harbouring misgivings? That's rather unlikely
• You cannot be sure if this describes you
• Hard to believe suspect is loaded for the most part
• Fellow unionist's participation in restoration of old tub is uncertain