Corporation accepting a lot of change in the boring stuff (6)
I believe the answer is:
tedium
'the boring stuff' is the definition.
The answer and definition can be both human attributes as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'corporation accepting a lot of change' is the wordplay.
'corporation' becomes 'tum' ('corporation' is a humorous term for stomach fat).
'accepting' indicates putting letters inside (inserted letters are accepted).
'a lot of' means to remove the last letter (a lot of but not all of the word).
'change' becomes 'edit' (edit can mean to change or alter).
'edit' with its final letter removed is 'edi'.
'tum' going around 'edi' is 'TEDIUM'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for tedium that I've seen before include "Boredom, mental weariness" , "boring" , "Dullness, monotony" , "'Boredom, ennui (6)'" , "Routine" .)