Possible Clues:

• Messy situation boxers, say, bring under control quickly
• Pig's ear
• Greyhounds start quickly - it's a mess!
• Hash?
• Terriers, for example, taking meal in mess
• Mess (served to Fido?)
• Drag baskets of rubbish into the Shambles?
• It's a mess? Maybe setter's needing short holiday, quick!
• Mess is something setter might make a meal of
• Maybe setter's tight after time off -- it's a mess