Story's odd characters getting a protein (4)
I believe the answer is:
soya
'a protein' is the definition.
(I've seen this before)
'story's odd characters' is the wordplay.
'odd' means one should take alternating letters.
'characters' becomes 'a' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The alternate letters of 'storys' are 'soy'.
'soy'+'a'='SOYA'
'getting' acts as a link.
Can you help me to learn more?
(Other definitions for soya that I've seen before include "nutritious bean" , "Crop with nutritious oil-rich seeds" , "Plant grown for its beans" , "Legume" , "source of protein" .)