See city Augustus captured with honour (8)
I believe the answer is:
glorious
'with honour' is the definition.
(I've seen this before)
'see city augustus captured' is the wordplay.
'see' becomes 'lo' (archaic exclamation meaning 'look!').
'city' becomes 'rio' (Rio de Janeiro).
'augustus' becomes 'gus' (I can't explain this - if you can you should give a lot more credence to this answer).
'captured' is an insertion indicator.
'lo'+'rio'='lorio'
'lorio' put into 'gus' is 'GLORIOUS'.
Can you help me to learn more?
(Other definitions for glorious that I've seen before include "Resplendent" , "Splendid, excellent" , "with honour" , "'Magnificent, splendid (8)'" , "Strikingly beautiful or impressive" .)