Brown's income, bulky (10)
I believe the answer is:
cumbersome
'bulky' is the definition.
(thesaurus)
'brown's income' is the wordplay.
I cannot quite see how this works, but
'brown's' could be 'umbers' (umber is a kind of brown) and 'umbers' is found within the answer.
The remaining letters 'come' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for cumbersome that I've seen before include "Unwieldy" , "Awkward" .)