秋
=
火
+
禾
:
Mnemonic symbol: from 秋千 (qiu1 qian1), swing (seat hung from a frame or branch).
The Queen of Hearts (qi) celebrates autumn (秋) by offering sacrifices. She puts a bowl of cereals (禾) onto a swing (秋) and has the cereals swing into a fire (火) in front of the outhouse (ou1).