Children meditate moodily (5)
I believe the answer is:
brood
I believe this clue is a double definition.
'children' is the first definition.
(thesaurus)
'meditate moodily' is the second definition.
(I've seen this before)
(Other definitions for brood that I've seen before include "Meditate moodily" , "Clutch" , "Think resentfully about family of children?" , "Family of young birds" , "Meditate, fret" .)