Took in ruins, admitting yen to see capital (5)
I believe the answer is:
tokyo
'capital' is the definition.
(Tokyo is an example)
'took in ruins admitting yen' is the wordplay.
'in ruins' is an anagram indicator.
'admitting' indicates putting letters inside.
'yen' becomes 'y'.
'took' anagrammed gives 'toko'.
'toko' going around 'y' is 'TOKYO'.
'to see' is the link.
(Other definitions for tokyo that I've seen before include "This covers an Asian city" , "Edo's modern name" , "Capital of Japan" , "Large Japanese city" , "Kyoto (anag)" .)