Rich affluence includes fodder (5)
I believe the answer is:
chaff
'fodder' is the definition.
(I've seen this before)
'rich affluence includes' is the wordplay.
'includes' indicates a hidden word.
'CHAFF' is hidden within 'rich affluence'.
(Other definitions for chaff that I've seen before include "Light banter - husks from corn" , "Refuse - banter" , "fodder" , "twit" , "It's separated from wheat during threshing" .)