Officer's new bride touring Baltic port (9)
I believe the answer is:
brigadier
'officer's' is the definition.
(brigadier is a kind of officer)
'new bride touring baltic port' is the wordplay.
'new' indicates an anagram.
'touring' indicates putting letters inside (touring can mean going round).
'baltic port' becomes 'riga' (I've seen this before).
'bride' anagrammed gives 'bdier'.
'bdier' going around 'riga' is 'BRIGADIER'.
(Other definitions for brigadier that I've seen before include "High-ranking army officer" , "Officer in charge of army unit, part of division" , "Army rank" , "Air bridge over to the military officer" , "Rank above colonel" .)