Happening to be nothing but a dicky heart that needs treating (8)
I believe the answer is:
'happening' is the definition.
The answer and definition can be both related to change as well as being present participle verbs.
Maybe you can see an association between them that I don't see?
'be nothing but a dicky heart that needs treating' is the wordplay.
I cannot really see how this works, but
'be' could be 'occur' (synonyms) and 'occur' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'to' acts as a link.
Can you help me to learn more?
I've seen this clue in the Evening Standard.
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