In the Canberra Battalion? Capital! (5)
I believe the answer is:
rabat
'capital' is the definition.
(Rabat is an example)
'in the canberra battalion?' is the wordplay.
'in' indicates a hidden word.
'RABAT' can be found hidden inside 'canberra battalion'.
(Other definitions for rabat that I've seen before include "North African capital" , "N African capital" , "capital city" , "N African city" , "Moroccan capital" .)