Iron block in sylvan village (5)
I believe the answer is:
anvil
'iron block' is the definition.
(I've seen this before)
'in sylvan village' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ANVIL' is hidden within 'sylvan village'.
(Other definitions for anvil that I've seen before include "Iron block; incus" , "part of the ear" , "Metalworker's block" , "Bone" , "One frequently gets hammered" .)