What does the cryptic crossword clue "Some concern as alarm sounded by hooter (5)" mean?

The definition is "sounded by hooter". The wordplay uses a hidden word. Hidden in "some concerN AS ALarm sounded by hooter" The answer is NASAL.

Some concern as alarm sounded by hooter (5)

Times Cryptic #28979 | 27 Across | 2024-07-26 flower