Possible Clues:

• This plot may be of interest to you
• Puzzle concerning eyes said to need urgent treatment
• Not the plot where one does the sowing again
• Pique
• Connive in liaison
• Arouse the curiosity of
• Love-affair resulting in pique?
• How I grunt - i.e., that's the plot of it
• Puzzle of underhand plot
• Puzzle, urgent one I must crack