An ornament for the man in charge (4)
I believe the answer is:
boss
This clue is a triple definition!
'an ornament' is the first definition.
(boss is a kind of ornament)
'for' acts as a link.
'the man' is the second definition.
(I've seen this in another clue)
'in charge' is the third definition.
(thesaurus)
(Other definitions for boss that I've seen before include "Behave overbearingly" , "Person managing" , "Take charge of" , "Gaffer, manager" , "One who manages" .)