Someone accepted as eccentric (5,5)
I believe the answer is:
space cadet
'someone' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'accepted as eccentric' is the wordplay.
'eccentric' is an anagram indicator.
'accepted'+'as'='acceptedas'
'acceptedas' anagrammed gives 'SPACE CADET'.
Can you help me to learn more?
(Other definitions for space cadet that I've seen before include "one who often gets high" , "one high on drugs" , "trainee astronaut" .)