Written account of a voyage (3)
I believe the answer is:
log
'written account of a voyage' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for log that I've seen before include "Bulky piece of wood" , "Record on ship" , "Sea captain's diary of voyage" , "Diary kept by ship's captain" , "Piece of cut wood" .)