free hand

free hand idiom
Also, free rein. Freedom to do or decide as one sees fit. For example, The teacher gave her assistant a free hand with the class, or They gave me free rein to reorganize the department. The first expression dates from the late 1800s, the second from the mid-1900s.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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