Edward returned trio composed for city (7)
I believe the answer is:
detroit
'city' is the definition.
(Detroit is an example)
'edward returned trio composed' is the wordplay.
'edward' becomes 'ted' ().
'returned' shows that the letters should be reversed in order.
'composed' indicates an anagram.
'ted' written backwards gives 'det'.
'trio' anagrammed gives 'roit'.
'det'+'roit'='DETROIT'
'for' is the link.
(Other definitions for detroit that I've seen before include "Michigan car city" , "Origin of Motown" , "City in Michigan known for motor industry" , "Motown, Mich." , "American city" .)