What does the cryptic crossword clue "Keen reporter's start to the day (5)" mean?

The definition is "Keen". The wordplay uses a homophone (sounds like). sounds like (reporter’s) “morn” (start to the day). The answer is MOURN.

Keen reporter's start to the day (5)

Times Cryptic #28643 | 27 Across | 2023-06-30 flower