Possible Clues:

• Common ''Dilbert'' setting
• Poor clue about ballpoint in kiosk
• Cell walls of course keeping line by university writer
• Frequent ''Dilbert'' drawing
• Small room, not half brilliant for accommodating superior writer
• Poor clue about biro in kiosk
• Small partitioned-off area of a room
• Small room for special use
• Small changing room
• Stall and hit rocks left nearer the bottom