It's my belief it will be retracted, too (5)

I believe the answer is:
tenet
'it's my belief' is the definition.
I can't tell whether this definition defines the answer.
'it will be retracted too' is the wordplay.
'it' becomes ''t' (abbreviation. e.g. in 'tis).
'will be' becomes 'tene' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'retracted' says the letters should be written backwards.
'too' is a charade indicator (letters next to each other).
'tene' reversed gives 'enet'.
't'+'enet'='TENET'
Can you help me to learn more?
(Other definitions for tenet that I've seen before include "That's the law" , "Dogma or principle" , "Belief held as true" , "Article of faith; doctrine" , "Adiaphoron" .)
