Suppressed swan on the day (5)
I believe the answer is:
muted
'suppressed swan on the day' is the definition.
The definition and answer can be both related to change as well as being past participle verbs.
Maybe there's an association between them I don't understand?
'swan on the day' is the wordplay.
'swan' becomes 'mute' (mute swan is a kind of swan).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'the day' becomes 'd' (abbreviation for day).
'mute'+'d'='MUTED'
Can you help me to learn more?
(Other definitions for muted that I've seen before include "Kept quiet" , "low-key" , "Not loud" , "Faint" , "(Of colour) subdued" .)