Related Clues:

• Cushion to rest the joints between thigh and shin bones
• One in a submissive position is a devious person between king, knight and queen
• Prie-dieu feature
• Prayer rug user, say
• Support in a confessional
• Cushion in chuch pew
• Tile setter, often
• One being dubbed
• Gutting easier, after bottom of boat secured new cushion
• Hassock, maybe
• Maybe one proposing name aboard boat? I don't know