Possible Clues:

• Oh see, see that's the way to stop the duel at last
• Form a certain front, in meteorology
• Block, obstruct
• Conceal lines about c-crossword element being incomplete
• Close up (an orifice or passage)
• Block daughter entering some of crossword after company turns up
• Jam company lifted what's left of damsons into tip
• One of these had homophone cut off
• Obstruct commander and law lord entering church
• Bar coding primarily in Cloud working with engineer