Mean villager conceals bone (5)
I believe the answer is:
anvil
'bone' is the definition.
(anvil is a kind of bone)
'mean villager conceals' is the wordplay.
'conceals' indicates a hidden word.
'ANVIL' is hidden in the letters of 'mean villager'.
(Other definitions for anvil that I've seen before include "Metalworker's block" , "Block used in forge" , "A blacksmith's iron block" , "Forging block" , "One frequently gets hammered" .)