Offspring feel depressed, maybe (5)
I believe the answer is:
brood
'offspring' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for brood that I've seen before include "Meditate, fret" , "Sulk; incubate" , "Worry over" , "Ponder - family" , "Think resentfully - about young birds?" .)