Rustic worker's after vegetables (7)
I believe the answer is:
peasant
'rustic' is the definition.
(peasant is a kind of rustic)
'worker's after vegetables' is the wordplay.
'worker' becomes 'ant' (worker is a type of ant).
'after' says to put letters next to each other.
'vegetables' becomes 'peas' (I've seen this before).
'ant' after 'peas' is 'PEASANT'.
(Other definitions for peasant that I've seen before include "Country labourer" , "Rural person of low class" , "Yokel" , "Lowly 20 worker" , "Farm worker - ignorant person" .)