Ancient poet seen back in Vladivostok (4)
I believe the answer is:
ovid
'ancient poet' is the definition.
(Roman poet)
'back in vladivostok' is the wordplay.
'back' says the letters should be written backwards.
'in' says the answer is hidden in the clue.
'divo' can be found hidden inside 'vladivostok'.
'divo' backwards is 'OVID'.
'seen' is the link.
(Other definitions for ovid that I've seen before include "Latin poet (Ars amatoria, Metamorphoses)" , "Old linesman" , "Roman love poet" , "Roman poet (Metamorphoses)" , "Void for old Roman poet" .)