The phrase "a redoubt for" is correct and usable in written English.
It can be used to describe a place or situation that serves as a refuge or stronghold for a particular purpose or group.
Example: "The community center has become a redoubt for local artists seeking a space to showcase their work."
Alternatives: "a stronghold for" or "a haven for".
The island of Manhattan was a British garrison and a redoubt for the loyalists who clustered there.
They comprise 540sq miles of near impenetrable wilderness with no permanent human habitation; a redoubt for endangered wildlife, protecting an estimated 450 royal Bengal tigers.
The valley is a redoubt for grizzly bears, and an important connector between bears further north in Canada, and threatened bears in the United States.
The Vedeno Gorge has long served as a redoubt for rebels and a major supply line for infiltration from neighboring Dagestan and Georgia.
One Democratic strategist said that parts of the Obama organization are still mistrustful of the national committee, seeing it as a redoubt for Hillary and Bill Clinton loyalists.
The attack was the most serious security breach in Aden, the country's southern capital and Hadi's hometown, which has been under coalition control for months and is a redoubt for pro-government forces battling to restore the president's rule.
Analysts say the European films' share has deteriorated further this year, especially in France, the biggest movie producer in Europe and usually a redoubt of strength for domestic productions.
Rising from lowland plains, the remote plateau of Ethiopia's Bale Mountains is a high redoubt for an estimated 220 Ethiopian wolves.
This month I had occasion to spend 10 days in rural Alabama, on a lake serving as a weekend redoubt for the swells of Birmingham to the north and Atlanta to the northeast.
It was a fine spot, defensible one felt, a suitable redoubt for England's last eagle and one where he can often be found.
Belle Meade, which resembles Buckhead, in Atlanta, or Mountain Brook, near Birmingham, is a prosperous redoubt for businessmen and country-music stars; it encompasses a neighborhood of broad, sloping lawns, and houses with magnolia trees and "estate" driveways up front and glassy modern additions and swimming pools out back.
