Answer:
What loses its head every morning only to get it back every night?
A seasonal fashion statement named for the weather it's worn in.
What has a neck but can't swallow?
What is the word that even in plain sight remains hidden?
I am partially baked. I am not completely lit. I am a portion of the moon. I am lesser than full wit. I am a divider of the hour. I am not a total lie. I am a sibling through one parent.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.