Possible Clues:

• The way one dismissed about 150 is quite unsound
• Mum is retreating fast
• By the sound of it, there is nothing back that was loaned
• Nothing, by the sound of it, is back and fast
• Say nothing if it is wrong to have made the loan
• Dumb boy in post
• Listen (anag.)
• You've not heard anything of the 150 sent around
• Second appeal involving little boy¹s mum
• Unvoiced