Veggies snap about everyone having steak starter (8)
I believe the answer is:
shallots
'veggies' is the definition.
(shallots are vegetables)
'snap about everyone having steak starter' is the wordplay.
'snap' becomes 'shot' (I've seen this before).
'about' is an insertion indicator.
'everyone' becomes 'all' (all people).
'having' is a charade indicator (letters next to each other).
'starter' says to take the initial letters.
The first letter of 'steak' is 's'.
'shot' placed around 'all' is 'shallot'.
'shallot'+'s'='SHALLOTS'
(Other definitions for shallots that I've seen before include "vegetables" , "Small onion species" , "Onion-like plants with clusters of bulbs" , "Onion-like plant with clusters of bulbs" , "Small, mild-flavoured, onion-like bulbs" .)