He's in the right position not to be found out (7)
I believe the answer is:
insider
'he's in the right position not to be found out' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'he's in the right position' is the wordplay.
I cannot really see how this works, but
'in' is found in the answer.
'right' could be 'r' (common abbreviation) and 'r' is found in the answer.
'position' could be 'side' (synonyms) and 'side' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for insider that I've seen before include "one who's in the know" , "member of favoured group?" , "Illegal sort of dealing" , "This trading is illegal, based on confidential information" , "Person privy to information within an organisation" .)