Possible Clues:

• Flag position
• 'Flag flying there in the morning of the dead, by the sound of it (4-4)'
• Position of respect on the staff
• Honorary flag position
• Stop receiving radio signal while at a lower position
• The sound of morning is flagging at there
• Position of flag during period of mourning
• Position of flag during time of mourning
• Position of flag to signal mourning
• Not the whole of where it's flying, for the whole of the morning, by the sound of it