One flying north, perhaps, out East? (6)
I believe the answer is:
hornet
'one flying' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'north perhaps out east?' is the wordplay.
'perhaps' indicates anagramming the letters.
'out' means one lot of letters goes inside another.
'east?' becomes 'e' ('E' can be a synonym of 'east').
'north' with letters rearranged gives 'hornt'.
'hornt' enclosing 'e' is 'HORNET'.
Can you help me to learn more?
(Other definitions for hornet that I've seen before include "Run through" , "Stingy type" , "Stinging insect" , "Vespa" , "A large wasp with severe sting (6)" .)