Simplicity of resting place long ago sited outside church (9)
I believe the answer is:
innocence
'simplicity' is the definition.
(thesaurus)
'resting place long ago sited outside church' is the wordplay.
I cannot really see how this works, but
'church' could be 'ce' (Church of England) and 'ce' is located in the answer.
'outside' could be 'non' and 'non' is found in the remaining letters.
The remaining letters 'ince' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'of' acts as a link.
Can you help me to learn more?
(Other definitions for innocence that I've seen before include "probity" , "clean?" , "Uncorrupted state" , "Absence of sin" , "Lack of guilt" .)