Suella Braverman has lashed out at Michael Gove and rebel Tories who "staged a coup" over Liz Truss's tax cuts for the rich.
The Home Secretary criticised Mr Gove, widely known as disruptor-in-chief, for "airing dirty linen in public" when he publicly criticsed the measures before the Prime Minister made an embarrassing U-turn on abolishing the 45p tax rate.
Ms Braverman said Mr Gove "got it wrong" and should have been "encouraging support" for the PM's plans, because "that's what critical friends do".
Speaking directly to the former minister, Ms Braverman told Chopper's Politics podcast at Tory conference: "Michael if you’ve got concerns raise them in private because that is what our party does.
"That’s what you do as a friend, as a critical friend, you take them aside. You don’t air your dirty linen in public."
Describing her disappointment over the U-turn, she said: "I was a supporter of the cuts. It would have stimulated growth.
"It would have enouraged higher earners to work more, to bring more and invest more in this country so I'm disappointed.
"But I accept their reasons."
In a direct message to Mr Gove, she added: "I do think he got it wrong over this. It's incumbent on him to encourage the new administration to succeed. We’re on the same team. We should be focused on uniting for the British people.
"Because the thing that keeps me up at night is the prospect of a Labour Government."
At the same event, Ms Braverman said it was her "dream" to see a removal flight finally head to Rwanda after months of disruption.
The Home Secretary said she would love to see a picture of the plane splashed on the front page of The Telegraph.
Expressing her determination to reduce the number migrants who successfully seek refuge in the UK, she said: "We need to get net migration down.
"That is my unfiltered unvarnished, unapologetic view overall. Migration, net migration, however you want to call it needs to come down as 230,000 was a large number."
