A clergyman suppressed initial story of pests (6)
I believe the answer is:
aphids
'pests' is the definition.
(I've seen this before)
'a clergyman suppressed initial story' is the wordplay.
'clergyman' becomes 'p' (abbreviation for priest).
'suppressed' becomes 'hid'.
'initial' indicates taking the first letters.
The initial letter of 'story' is 's'.
'a'+'p'+'hid'+'s'='APHIDS'
'of' acts as a link.
(Other definitions for aphids that I've seen before include "Sucking insects" , "Small insects like greenfly feeding on plants" , "Plant lice like greenfly" , "Small insects like greenfly or blackfly" , "Garden pests" .)