Possible Clues:

• Restricted, with "up"
• Restrained, with ''up''
• Abbr. on a certain elevator button
• Repressed (with "up")
• Cooped up in pup tent, badly put out
• Kept in
• Shut up, but partially open tomorrow
• Start to write it and shut up
• Bottled, with "up"
• Constrained (with ''up'')