Had an influence as little devil, having done something (8)
I believe the answer is:
impacted
'had an influence' is the definition.
The answer and definition can be both related to change as well as being past participle verbs.
Perhaps you can see a link between them that I don't see?
'little devil having done something' is the wordplay.
'little devil' becomes 'imp' (an imp is a little demon).
'having' means one lot of letters go next to another.
'done something' becomes 'acted' ('act' can be a synonym of 'do something').
'imp'+'acted'='IMPACTED'
'as' acts as a link.
Can you help me to learn more?
(Other definitions for impacted that I've seen before include "Had an effect upon" , "Wedged or packed in together, as a tooth say" , "had influence" , "Crushed" , "Of tooth, wedged between another tooth and jaw" .)