In aid of somebody/something - Idioms by The Free Dictionary
in aid of somebody/something
in aid of in support of; for the purpose of raising money for. chiefly British
1999 Teesdale Mercury A wine and savoury evening in aid of cancer research will be held…on Friday.
in aid of somebody/something (British English) in order to help somebody/something: The children spent the day collecting money in aid of charity.