Colin __, Author of the Inspector Morse Books
Puzzle 18 of National Crossword Day Hard Pack
Question is: Colin __, Author of the Inspector Morse Books
and the answer is: DEXTER
Word Meaning:
DEXTER — (archaic outside heraldry) Right; on the right-hand side. (In heraldry, specifically the bearer's right, which is the viewer's left.)
Definitions from Wiktionary.