Field worker finding insect on vegetables (7)
I believe the answer is:
peasant
'field worker' is the definition.
(I've seen this in another clue)
'insect on vegetables' is the wordplay.
'insect' becomes 'ant' (ant is a kind of insect).
'on' says to put letters next to each other.
'vegetables' becomes 'peas' (peas are a type of vegetable).
'ant' put after 'peas' is 'PEASANT'.
'finding' acts as a link.
(Other definitions for peasant that I've seen before include "One from the country" , "Poor farmworker" , "Rural person of low class" , "rude fellow" , "Lowly 20 worker" .)