Possible Clues:

• Where Jimmy Buffett chills
• Son tucked into a meal - not reached the port yet?
• Muddled on the ocean?
• Take a satnav around, regularly getting lost
• Bewildered; sailing
• Bewildered fly-half surrounded by non-drinkers
• Baffled, befogged or befuddled
• On the Aegean, e.g
• Bewildered on the ocean?
• On a 42-Across