Diatribe from American resonated amidst shouting (8)
I believe the answer is:
harangue
'diatribe' is the definition.
(I've seen this before)
'american resonated amidst shouting' is the wordplay.
'american' becomes 'a' (common abbreviation - e.g. in organisation names).
'resonated' becomes 'rang' (I've seen this in another clue).
'amidst' is an insertion indicator (amidst can mean between or within).
'shouting' becomes 'hue' (I can't explain this - if you can you should believe this answer much more).
'a'+'rang'='arang'
'arang' inserted within 'hue' is 'HARANGUE'.
'from' is the link.
Can you help me to learn more?
(Other definitions for harangue that I've seen before include "Tirade, diatribe" , "A lengthy vehement speech, may be abusive" , "Loud and agressive speech" , "'Loud, long diatribe (8)'" , "Declamation - lecture" .)