Possible Clues:

• Helps baby after meal and becomes nervous
• 'One's scared of the blow the old clock gets (4,3,4,2)'
• If one has such a burp it puts the fear of God in you
• Doesn't stay calm - gets in a frightful state
• Fights frightful flatulence
• The baby and the clock, each of them does it. Frightful, isn't it?