Possible Clues:

• Gentle stream of song
• 'Flow gently, sweet ___ ...': Burns
• 'Sweet' stream, to Burns
• Flow gently sweet ______
• "Sweet" river in a Burns poem
• 'Sweet' stream of poetry
• Burns's 'sweet' stream
• '___ Water' (Burns song)
• "Flow Gently Sweet ___"
• River in a Burns' poem