Part of India's nuclear rise not spoken about (6)
I believe the answer is:
unsaid
'not spoken about' is the definition.
I can't tell whether this definition defines the answer.
'part of india's nuclear rise' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'rise' shows that the letters should be reversed in order.
'diasnu' is hidden within 'indias nuclear'.
'diasnu' written backwards gives 'UNSAID'.
Can you help me to learn more?
(Other definitions for unsaid that I've seen before include "Not made explicit" , "not pronounced" , "Not spoken" , "with lack of expression" , "withdrawn" .)