Line suggesting Stead might become depressed? (4)
I believe the answer is:
note
'line' is the definition.
(synonyms)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for note that I've seen before include "Comment" , "Symbol in a score" , "Tone of brief written record" , "Be mindful of" , "Some money - some music" .)