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.

• fine by someone
• fine kettle of fish
• fine line
• fine print
• finger in every pie
• finger on the pulse
• finger on the pulse of
• finger on the pulse of something
• fingers crossed
• finish off
• finish someone off
• finish something off
• fire a shot across
• fire a shot across someone's
• fire a shot across the bows
• fire blanks
• fire in
• fire in the belly
• fire in your
• fire off
• fire off something
• firing on all cylinders
• firm hand on the tiller
• first among equals
• first and foremost