Party starts to go and eat with official (4)
I believe the answer is:
doge
'official' is the definition.
(doge is a kind of official)
'party starts to go and eat' is the wordplay.
'party' becomes 'do' (do can informally mean a party).
'starts to' says to take the initial letters.
'and' is a charade indicator (letters next to each other).
'eat' becomes 'e' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The first letter of 'go' is 'g'.
'do'+'g'+'e'='DOGE'
'with' is the link.
Can you help me to learn more?
(Other definitions for doge that I've seen before include "Title of former ruler of Venice" , "Chief of ancient Venice" , "Venetian leader" , "Historically, the chief magistrate of Venice or Genoa" , "Old ruler of Venice" .)