My thoughts ought not to be included in these stories (5)
I believe the answer is:
myths
'these stories' is the definition.
(myth is a kind of story)
'my thoughts ought not' is the wordplay.
'not' indicates named letters should be taken away.
'thoughts' with 'ought' taken out is 'ths'.
'my'+'ths'='MYTHS'
'to be included in' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for myths that I've seen before include "Legends to present truths" , "Fabulous tales" , "Fables" , "Widely held but false beliefs" , "Legendary stories" .)