Possible Clues:

• Prevalent
• Extensive ... and what's literally seen in this puzzle's circles
• Far-reaching ... and a literal feature of the answers to starred clues
• Extra food, in general
• Wife despaired, being treated as common
• General's generous feast
• Generally prevalent
• 14 Sweeping extra study, accepting scant payment at first
• Common, where there is extra meal laid out
• With extensive bound­aries extra cover is required