the brains behind

the brains behind something

the person who provides ideas and plans for an activity Someone very clever must be the brains behind such an organized group of thieves.

Name	Pronounced	Usage
DionÝZ	-	Slovak
Saburo	sah-boo-ṙo:	Japanese
Charissa	kə-RIS-ə	English
Lawler	['lɔ:lə]
Sapphire	SAF-ier	English (Rare)
Yidel	-	Yiddish