Not exploited or secretly recorded (8)
I believe the answer is:
untapped
'secretly recorded' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs can occasionally define each other.
'not exploited' is the wordplay.
'not' becomes 'un' (prefix meaning 'not').
'exploited' becomes 'tapped' ('tap' can be a synonym of 'exploit').
'un'+'tapped'='UNTAPPED'
'or' acts as a link.
Can you help me to learn more?
(Other definitions for untapped that I've seen before include "Not drawn upon, unexploited" , "Like virgin reserves" , "Not yet exploited" .)