Possible Clues:

• Cheap joke ultimately worries no comic
• Relating to careful financial management
• Capable of operating at a profit
• Cost-effective small company with external source of income
• Comic one giving a good return for money laid out
• Relating ot the management of wealth
• Profitable English company has no male in charge
• Coo, mince! (anag.)
• The firm negative in the mice makes them pay (8)
• Inexpensive English periodical entertaining small number