Poems since returned to Ukrainian port (6)
I believe the answer is:
odessa
'ukrainian port' is the definition.
(I've seen this in another clue)
'poems since returned' is the wordplay.
'poems' becomes 'odes' (ode is a kind of poem).
'since' becomes 'as' (I've seen this in other clues).
'returned' is a reversal indicator.
'as' back-to-front is 'sa'.
'odes'+'sa'='ODESSA'
'to' is the link.
(Other definitions for odessa that I've seen before include "Battleship Potemkin mutiny port" , "Port city on the Black Sea" , "Black Sea location" , "Ukrainian Black Sea port" , "Port city of Ukraine" .)