Possible Clues:

• One who brings up gems from the sea
• One looking for seafood, fruit and meat, eating dodgy starter
• He sinks low, looking for gems and fruit? Awful drivel!
• He may receive order for oysters, fruit and meat outside World's End
• Fruit at length taken by bird — oyster-catcher?
• Finding fruit beginning to decay among meat, one takes a deep breath
• One who seeks gems underwater