Setter does note attempt to show great reverence (8)
I believe the answer is:
idolatry
'great reverence' is the definition.
'idolatry' can be an answer for 'reverence' (I've seen this before). I am not certain of the 'great' bit.
'setter does note attempt to' is the wordplay.
'setter does note' becomes 'idola' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'attempt to' becomes 'try' (I've seen this in other clues).
'idola'+'try'='IDOLATRY'
'show' acts as a link.
Can you help me to learn more?
(Other definitions for idolatry that I've seen before include "bowing down before a goddess?" , "Worship of carved images" , "Excessive adoration" , "Extreme admiration" , "Worship of a false god" .)