be the brains behind (something)

to be the person who plans and organizes something, especially something successful.

He was the brains behind many of the best movies ever made.

• on no account should do
• on no account should do something
• on no account should someone do
• on no account should someone do something
• on occasion
• on order
• on own
• on own account
• on own head be it
• on own hook
• on own time
• on pain of
• on pain of death
• on pain of something
• on paper
• on person
• on pins and needles
• on principle
• on purpose
• on radar
• on radar screen
• on record
• on safe ground
• on schedule
• on second thought