Pub lunch of communal starters and additional sides (5)
I believe the answer is:
local
'pub' is the definition.
(one's local pub)
'lunch of communal starters and additional sides' is the wordplay.
'starters' suggests taking the first letters (the letters which start the words).
'and' is a charade indicator (letters next to each other).
'sides' means to remove the middle letters (only the letters on the sides are used).
'additional' with its centre removed is 'al'.
The first letters of 'lunch of communal' is 'loc'.
'loc'+'al'='LOCAL'
(Other definitions for local that I've seen before include "Nieghbourhood pub or its customer" , "belonging to particular area?" , "Your friendly neighbourhood pub" , "Pub around the corner?" , "Restricted number" .)