Possible Clues:

• Ne'er-do-wells
• First-rate roof broken protecting new objects by ne'er-do-wells
• Man upstairs admits band from army post briefly gets zilch from son of ne'er-do-wells
• Ne'er-do-wells from 10 across in favour of working on nights?
• Man upstairs consumes duck with short fork and it's zilch to do with son of ne'er-do-wells
• No-accounts
• Feckless types in front hog broadcast, entering property
• First-rate roof broken, protecting new objects, by ne'er-do-wells
• Lowlifes