City alas in ruins around each end (5)
I believe the answer is:
lhasa
'city' is the definition.
(Lhasa is an example)
'alas in ruins around each end' is the wordplay.
'in ruins' indicates anagramming the letters.
'around' indicates putting letters inside.
'end' suggests the final letters.
The final letter of 'each' is 'h'.
'alas' anagrammed gives 'lasa'.
'lasa' enclosing 'h' is 'LHASA'.
(Other definitions for lhasa that I've seen before include "Asian capital" , "Tibetan dog breed" , "foreign capital" , "The Forbidden City in Tibet" , "Tibetan capital" .)