Possible Clues:

• Broad-leafed maritime plant
• Potted maritime plant
• Audible search for drink and food by the coast
• Holds water for Kathleen on the beer in aquaculture perhaps
• Mustard family plant
• Coastal plant of the crucifer family
• Maritime cabbage
• Coastal plant with collard-like leaves
• Hunt for vegetable ale, by the sound of it
• European coastal plant