Get smarter (5)
I believe the answer is:
preen
'get smarter' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for preen that I've seen before include "demonstrate pride" , "Tidy/clean (feathers)" , "Congratulate (oneself); attend to dress" , "Tidy and clean (plumage)" , "Beautify" .)