Possible Clues:

• They could be kind enough to be in command half a century over
• Orders with common characteristics
• They're kind of in need of a pound so as not to be particular
• Are they kind enough to give one pound towards his promotion?
• How kind of the commander not to have to fifty!
• They're kind to the commander when he's lost a pound
• Groups with common characteristics
• How kind they are to the commander when he hasn't got a pound like this
• They're kind of a green that's broken
• They're so kind with a green