Replace, Period, Age
The leader for the ceremony can't come so you need a substitute to replace them ASAP!
This kanji has another meaning too. The leader can't come to the ceremony because they forgot what period of time it was. If they think they're in the wrong age, they won't come because they're trying to lead some monkeys in the ceremony instead.
か, かわ, しろ
The substitute leader is wearing the wrong color clothes, so you have to dye (だい) them, like they did in the olden ages.