Public official dressing king (5)
I believe the answer is:
mayor
'public official' is the definition.
(I've seen this in another clue)
'dressing king' is the wordplay.
'dressing' becomes 'mayo' (mayo is a condiment or dressing).
'king' becomes 'R' (abbreviation for rex, king in Latin).
'mayo'+'r'='MAYOR'
(Other definitions for mayor that I've seen before include "Local bigwig" , "Town council head" , "Local government head" , "Head of a city council" , "Municipal leader" .)