Possible Clues:

• Exterior plaster
• Minor wounds turned over, applying firm plaster
• Being short of money, covers up plaster
• That carves up firm on the outside
• Kind of plaster used for wall decoration
• How one cuts up the firm for a finish (6)
• Conscription of Italian novelist reported
• After it cuts back, the firm is a mouldy sort of a thing
• A wall-coating plaster
• Cut back in southern firm's plaster