Blacksmith's heavy block (5)
I believe the answer is:
anvil
(Other definitions for anvil that I've seen before include "Heavy metal block in forge" , "Alvin (anag.)" , "Iron block; incus" , "Smith's heavy iron block" , "Block for hammering" .)
I believe the answer is:
anvil
(Other definitions for anvil that I've seen before include "Heavy metal block in forge" , "Alvin (anag.)" , "Iron block; incus" , "Smith's heavy iron block" , "Block for hammering" .)