Stone church used to store brown chicken feed (8)
I believe the answer is:
pittance
'chicken feed' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'stone church used to store brown' is the wordplay.
I cannot quite see how this works, but
'stone' could be 'pit' (synonyms) and 'pit' is found within the answer.
'church' could be 'ce' (abbreviation for Church of England) and 'ce' is present in the answer.
'brown' could be 'tan' (tan is a kind of brown) and 'tan' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for pittance that I've seen before include "minimum wage?" , "very little dough" , "Small, inadequate payment" , "tiny amount" , "Tiny sum" .)