Possible Clues:

• 'Go out and do the sowing again, by the sound of it (6)'
• Drop back
• Abate
• Soldiers give up and fall back
• A hairline can do it
• Go like the tide
• Go back to decree amendment
• Go back and do the sowing again?
• Decree (anag) — ebb
• Inch back slowly, as a hairline