Hit then escape from a pest (7)
I believe the answer is:
blowfly
'a pest' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'hit then escape' is the wordplay.
'hit' becomes 'blow' (blow can mean a hit).
'then' says to put letters next to each other.
'escape' becomes 'fly' (I've seen this in another clue).
'blow'+'fly'='BLOWFLY'
'from' acts as a link.
Can you help me to learn more?
(Other definitions for blowfly that I've seen before include "insect" , "Bluebottle" .)