Played loud on organ causing alarm (4)
I believe the answer is:
fear
'alarm' is the definition.
(I've seen this before)
'played loud on organ' is the wordplay.
'played loud' becomes 'f' (I am not sure about this - if you are sure you should believe this answer much more).
'on' says to put letters next to each other.
'organ' becomes 'ear' (ear is a kind of organ).
'f'+'ear'='FEAR'
'causing' acts as a link.
Can you help me to learn more?
(Other definitions for fear that I've seen before include "Qualms" , "Consternation" , "Anxiety caused by danger" , "Respect" , "Apprehension" .)