Brigade captured city (4)
I believe the answer is:
riga
'city' is the definition.
(Riga is an example)
'brigade captured' is the wordplay.
'captured' indicates the answer is hidden within the clue.
'RIGA' can be found hidden inside 'brigade'.
(Other definitions for riga that I've seen before include "Fix a rig up here for the Latvians" , "Latvian capital" , "capital in Europe" , "port in Latvia" , "Latvian port" .)