Iron block found in Roman villa (5)
I believe the answer is:
anvil
'iron block' is the definition.
(I've seen this before)
'in roman villa' is the wordplay.
'in' says the answer is hidden in the clue.
'ANVIL' is hidden in the letters of 'roman villa'.
'found' is the link.
(Other definitions for anvil that I've seen before include "A blacksmith's iron block" , "One frequently gets hammered" , "Block used in forge" , "Block for blacksmith" , "Smith's heavy iron block" .)