Supply the bread for Spooner's foul-smelling dish (8)
I believe the answer is:
bankroll
'spooner's foul-smelling dish' is the definition.
I can't judge whether this defines the answer.
'supply the bread' is the wordplay.
'supply' becomes 'bank' (I am not sure about this - if you are sure you should believe this answer much more).
'the bread' becomes 'roll' (roll is a kind of bread).
'bank'+'roll'='BANKROLL'
'for' is the link.
Can you help me to learn more?
(Other definitions for bankroll that I've seen before include "Fund" , "Provide finance for" , "keep afloat?" .)