Possible Clues:

• Bill plugging Royal Opera House? Something fishy here
• Certain pest, for short
• Short roasting with a constant heat for starter of fish popular with anglers
• Char swimming round old fish
• Insect similar to a termite
• Ancestor of a termite, surprisingly
• "Stiff" and "Bonk" writer Mary
• Last of joint method deleting application
• Fish that’s normally left after smoking
• Apartment pest, informally