Oddly indigenous ones avoided underground cells (8)
I believe the answer is:
dungeons
'underground cells' is the definition.
'oddly indigenous ones avoided' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'ones' is 'eons' which is located in the answer.
The remaining letters 'dung' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for dungeons that I've seen before include "Underground prisons" , "Underground prison cells" , "Underground cells for prisoners" .)