Statements of belief in long piece of writing, beginning to end (6)
I believe the answer is:
creeds
'statements of belief' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for creeds that I've seen before include "Beliefs and religions" , "Systems of beliefs" , "Church writings" , "Statements of belief" .)