Possible Clues:

• It's under two feet on the way in
• Uncomplaining person sometimes trampled on by trainers
• One gets so downtrodden on the way in
• One is so downtrodden
• Submissive person seen walking in?
• Complete layout without employing female wimp
• A spiritless fellow, way out and dull
• Opportunity on coaster for one who submits meekly to domination
• Downtrodden sort of shoe-cleaner?
• Rug (or person) that's walked all over