Passed on good books not yet visible (6)
I believe the answer is:
latent
'not yet visible' is the definition.
I can't judge whether this defines the answer.
'passed on good books' is the wordplay.
'passed on' becomes 'late' (both can mean dead).
'good books' becomes 'nt' (New Testament. I am not sure about the 'good' bit.**).
'late'+'nt'='LATENT'
Can you help me to learn more?
(Other definitions for latent that I've seen before include "'Hidden, undeveloped (6)'" , "Potentially existing but not presently evident" , "Talent (anag)" , "Potential, dormant" , "Existing but not yet active, say talent" .)