Blubber

FAT

"Hint: "Excess weight on a whale or seal." This hint keeps the context of marine animals while gently pointing toward the general concept of body fat without directly repeating "blubber" or giving away "FAT.""

The clue "Blubber" leads to the answer "FAT" through a straightforward definition. "Blubber" is a term often used to describe excess body fat, particularly in marine mammals like whales and seals. In this context, the clue is a direct synonym for "fat," making the answer a simple and clear connection.