Clue: Seafarer who wrote about navy leader in A Winding Road (6)
Answer: CONRAD
Explanation: Definition: Seafarer who wrote
A charade of C (*circa*, 'about') plus ONRAD, an envelope ('in') of N ('**N**avy leader') in ORAD, an anagram ('a winding') of 'road'. Despite the capitals, 'A Winding Road' is not by Conrad.