Possible Clues:

• It''s open to one to go on foot
• Worn by practically everyone on beach
• Type of footwear
• On beach alone, removing one item of apparel
• It's barely about a foot
• That sound wholly on foot
• It's open for one go on foot
• Start to have grit with it on foot
• Begins for 13 across and one half century more on foot
• Light strapped shoe