Capital citizen managed to secure high honour (5)
I believe the answer is:
roman
'capital citizen' is the definition.
'roman' can be an answer for 'citizen' (I have seen 'European citizen' mean 'roman' so perhaps 'citizen' could also mean 'roman'). I'm not certain of the 'capital' bit.
'managed to secure high honour' is the wordplay.
'managed' becomes 'ran' (both can mean organised or was in charge of).
'to secure' is an insertion indicator (inserted letters are secured inside).
'high honour' becomes 'OM' (Order of Merit).
'ran' going around 'om' is 'ROMAN'.
Can you help me to learn more?
(Other definitions for roman that I've seen before include "French story" , "Polanski" , "Caesar, for instance" , "Like a type" , "Caesar among others" .)