Possible Clues:

• On land, as a 44 Down
• Where Michael rowed his boat
• Wood and seaweed on the beach
• Burnt, crude, ground stuff
• Place for Michael to row his boat, in song
• Where some liberties are taken?
• Out of the main
• Onto the sand
• Not at sea with what's burnt and unrefined
• What's crude at last has been burnt at first but not at sea