Possible Clues:

• Like a cold sufferer
• When Cornelius got blocked he only made a joke of it, by the sound of it
• Overcrowded
• Blocked when cheat quipped, we hear
• Blocked (nose)
• Clogged up
• Like many a cold sufferer
• Overcrowded, too full
• Clogged
• The way things got wings got with a clog