Possible Clues:

• Like the freshest fruit
• Pub sandwiches extremely stale, like nothing's readily available
• Like clams during winter
• Readily available at the farmers' market
• Ready party to set about hosts
• Available pub -- marine therefore enters it
• In time to be a sailor at last
• Time to pick in the ocean, my boy 2, 6)
• What oysters 'R' during 'R' months
• Ready for harvesting