Carefully put in order A to M? (5)
I believe the answer is:
preen
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?
(Other definitions for preen that I've seen before include "Clean with the beak" , "Arrange feathers" , "Primp" , "Groom (oneself) with evident vanity" , "Perfect one's appearance" .)