Land lies in ruins (4)
I believe the answer is:
isle
'land' is the definition.
(isle is a kind of land)
'lies in ruins' is the wordplay.
'in ruins' indicates an anagram.
'lies' with letters rearranged gives 'ISLE'.
(Other definitions for isle that I've seen before include "Capri or Man, perhaps?" , "Sea-girt area" , "-- of Ely, Dogs, Man" , "Dogs, perhaps" , "Man, for one" .)