Clue: Like the Carpenter, or his mate, swallowing first of oysters? (6)
Answer: MOROSE
Explanation: Definition: Like the Carpenter
Definitely my favourite clue: O[ysters] in MORSE, a walrus, recalling the poem in *Through the Looking-glass, where the Walrus wept bitterly before ewating the oysters that he had invited to take a walk along the beach.