A flyer sleuths got back (5)
I believe the answer is:
pipit
'a flyer' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'sleuths got back' is the wordplay.
'sleuths' becomes 'pipi' (I can't explain this - if you can you should believe this answer much more).
'back' says to take the final letters (the letter at the back).
The last letter of 'got' is 't'.
'pipi'+'t'='PIPIT'
Can you help me to learn more?
(Other definitions for pipit that I've seen before include "Ground-dwelling songbird" , "Singer" , "Meadowland bird" , "Titlark" , "Songbird of rock or meadow" .)