Of concern to the listener (4)
I believe the answer is:
otic
'of concern to the listener' is the definition.
(I've seen this before)
'of concern to the' is the wordplay.
'of' becomes 'o''.
'concern' becomes 'ic' (I can't justify this - if you can you should give a lot more credence to this answer).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'the' becomes 't' (the is pronounced as a 't' sound in some dialects).
'ic' put after 't' is 'tic'.
'o'+'tic'='OTIC'
Can you help me to learn more?
(Other definitions for otic that I've seen before include "of lugs" , "about hearing" , "in relation to the listener" , "organ" , "of concern to the listener" .)