Possible Clues:

• Send into battle, in a way
• Some climbed steps to get into 16 part 2
• Firmly establish I have a qualification to teach
• Fix permanently (Var.)
• Plant overturned military intelligence plot
• Fix setter's getting sack
• Plant deeply (Var.)
• Claim of education graduate being put down
• Become deeply fixed
• Set securely (Var.)