Possible Clues:

• Strange precaution with mast? This isn't a hurricane!
• Important case developed about university is a bit of an exaggeration
• Spot of trouble on a campsite with turf cut badly
• It's derived from important cause? Yes and no
• Much Ado About Nothing's end (with nothing to show for earlier energy) in the bag, finished
• Much ado about nothing
• Minor trouble stirred up by Man U spectator: I'll join in
• Silly fuss damages important cause
• Leaves creating such a hoo-hah?
• Exaggerated trouble brewing?