Entertain original port official (7,6)
I believe the answer is:
harbour master
'port official' is the definition.
(I've seen this before)
'entertain original' is the wordplay.
'entertain' becomes 'harbour' (synonyms).
'original' becomes 'master' (synonyms).
'harbour'+'master'='HARBOUR-MASTER'
(Other definitions for harbour master that I've seen before include "Person in charge of anchorage" , "Port Authority" , "Port supervisor" , "Official supervising a port" , "Officer in charge of port" .)