Possible Clues:

• Might the officer overturn the 21 across and change the North
• Officer sees a large bird on boat
• Black reform in tabloid ranked fairly low
• Junior officer gets warship to change direction
• Book to convert into newspaper of lower status
• Army officer below captain
• After the bus overturned, the officer learnt it was twisted
• Junior officer makes warship change direction
• Embracing change, replace new officer
• Young army chap is awkward, but learns