Said it's after a flying insect
I believe the answer is:
bee
'a flying insect' is the definition.
(I've seen this before)
'said it's after' is the wordplay.
'said' becomes 'be' (I can't explain this - if you can you should give a lot more credence to this answer).
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
'after' means one lot of letters go next to another.
'be'+'e'='BEE'
Can you help me to learn more?
(Other definitions for bee that I've seen before include "Hairy-bodied insect" , "Useful insect" , "Social worker possibly" , "Insect that bumbles?" , "Hymenopterous insect" .)