A phrase consists of a group of words that do not make complete sense.
- The sun rises in the east.
- Humpty Dumpty sat on a wall.
- There came a giant to my door.
- It was a sunset of great beauty.
- The tops of the mountains were covered with snow.
- Show me how to do it.
- He has a chain of gold.
A clause consists of a group of words within a sentence that makes complete sense (i.e. a clause consists of a group of words with its own subject and predicate).
- He has a chain which is made of gold.
- People who pay their debts are trusted.
- We cannot start while it is raining.
- I think that you have made a mistake.