Phrase:A Phrase is a group of words, which makes sense, but not complete sense. It has neither a subject nor a predicate.
He has a pen of silver. (of silver - Phrase)
Clause:A Clause is a group of words which has a subject and a predicate, but it does not make a complete sense.
He has a pen which is made of silver.
which is made of silver - Clause
which - subject; is made of silver - predicate
Next:Parts Of Speech