Possible Clues:

• Sow to get little ones with no near noise
• Litter in distant part of allotment maybe
• To have little pigs is not nearly so noisy
• A litter of pigs
• Little swine's extreme racket
• An ex of Sinatra
• Distant line of houses generating litter
• Noise in the distance produced by pigs
• Little piggies making extreme noise
• The distant noise 15 across will make when the young are arriving