be the brains behind/of somethingDEVELOPto be the person who thought of and developed a particular plan, system, or organization, especially a successful one 是某事的策划者[智囊,中枢人物] Danny’s definitely the brains of the project. 丹尼绝对是这个项目的策划者。
be the brains behind/of something• Bakewell senses that Rudd was the brains behind the fraud, but it was the brothers who were condemned to death.• Builtin computers are the brains behind them.• Maybe it was them who built the fences and he was the brains behind the organization.
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