Answer:
What has a head and a tail, but no body or legs?
I am the noblest musical instrument
I am a king who's good at measuring stuff.
I am born in fear raised in truth and I come to my own in deed. When comes a time that I'm called forth I come to serve the cause of need.
I lose my head in the morning and regain back it at night.
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk