Victor perplexed coroner entertaining question on uniform (9)
I believe the answer is:
conqueror
'victor' is the definition.
(conqueror is a kind of victor)
'perplexed coroner entertaining question on uniform' is the wordplay.
'perplexed' indicates an anagram.
'entertaining' indicates putting letters inside.
'question' becomes 'q'.
'on' says to put letters next to each other.
'uniform' becomes 'u' (phonetic alphabet: alpha, bravo, charlie etc.).
'coroner' with letters rearranged gives 'coneror'.
'q'+'u'='qu'
'coneror' placed around 'qu' is 'CONQUEROR'.
(Other definitions for conqueror that I've seen before include "Victor, winner" , "humbler?" , "William of Normandy" , "For one, William" , "William's title after 1066 battle" .)