Clue: Gather undoctored author lacks English (4)
Answer: SUSS
Explanation: Definition: Gather
A subtraction: S[e]USS (Theodore Seuss Geisel, who wrote under the pen name Dr. Seuss – 'undoctored' because the "Dr." is not in the answer, and also because he left Oxford without getting a D Phil – although he was later awarded an honory doctorate by Dartmouth, becoming, as he put it, Dr. Dr. Seuss) minus the E ('lacks English').