Encouragement to listen to Beethoven’s fourth (5)
I believe the answer is:
heart
'encouragement' is the definition.
The answer and definition can be both feelings as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'listen to beethoven's fourth' is the wordplay.
'listen to' becomes 'hear' (I've seen this before).
'beethoven's fourth' becomes 't' (I can't justify this - if you can you should give a lot more credence to this answer).
'hear'+'t'='HEART'
'to' is the link.
Can you help me to learn more?
(Other definitions for heart that I've seen before include "Vital organ - centre - courage" , "Playing card - pity" , "Decorated (cake)" , "Central part" , "It's in the chest" .)