Possible Clues:

• Everlasting conclusions about the French
• This team makes you tea
• Perennial Dawson maybe planted in borders
• Constant object? Not so!
• Not interrupted without purpose
• Ring-like? Some may think Wagner's is!
• Potentially boring English head keeps Dalziel's dictated letters
• Attend lessons, some boring
• Constant, heading off straight?
• Finishes off Trim takeaway - it's nonstop