I hear about two notes in worship (8)
I believe the answer is:
idolatry
'worship' is the definition.
(idolatry is a kind of worship)
'i hear about two notes' is the wordplay.
'hear' becomes 'try' (to hear or try a case in the legal sense).
'about' means one lot of letters go next to another.
'two notes' becomes 'dola' (I can't explain this - if you can you should give a lot more credence to this answer).
'try' put after 'dola' is 'dolatry'.
'i'+'dolatry'='IDOLATRY'
'in' is the link.
Can you help me to learn more?
(Other definitions for idolatry that I've seen before include "Worship of a false god" , "Icon worship" , "reverence" , "Getting worked up by image" , "bowing down before a goddess?" .)