Possible Clues:

• Does Bess panic' with bee in her bonnet?
• Fanatical old boy being curbed by son and daughter
• Being excessively concerned with something
• Perhaps the boss can think of nothing else with the Dee
• With a thing about getting the bosses confused over who is the editor
• With mind continually occupied, abnormally focused
• Consumed (with)
• Preoccupied with
• Preoccupied with, really
• Hung up