He has publicity consultant as boss (7)
I believe the answer is:
headman
'boss' is the definition.
(I've seen this before)
'he has publicity consultant as' is the wordplay.
'has' is a charade indicator (letters next to each other).
'publicity' becomes 'ad' (short for advert).
'consultant as' becomes 'man' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'he'+'ad'+'man'='HEADMAN'
Can you help me to learn more?
(Other definitions for headman that I've seen before include "Boss" , "Chieftain" , "Village chief" , "Leader" .)