Set ten out as principles (6)
I believe the answer is:
tenets
'principles' is the definition.
(I've seen this before)
'set ten out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'set'+'ten'='setten'
'setten' with letters rearranged gives 'TENETS'.
'as' is the link.
(Other definitions for tenets that I've seen before include "Principles, beliefs" , "Doctrines or dogmas" , "Conviction" , "Principles, doctrines" , "'Beliefs, dogmas (6)'" .)