Possible Clues:

• Time to conclude home study mark
• Put in order in a depressed sort of way
• In order to do this, get tin around the lair
• Make recesses or notches in
• Leave five spaces, perhaps
• Notch on edge
• Official order placed during the Depression
• Apply for this during the depression
• Make a purchasing order - place away from the margin
• Put in for what's let in and knocked in (6)