Freud contemporary (5)
'freud contemporary' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for adler that I've seen before include "Contemporary of Freud, and German for eagle" , "Alfred _; Austrian psychiatrist" , "US musician" , "Austrian psychologist, 1870-1937" , "Larry - - , mouth-organist" .)