A new word puzzle

Question

Here is a new, original puzzle that I have made! You have to find the word that I describe.

Me, I am an introduction

My anagram is past tense of what you are doing now.

The homophone of my anagram is used with it in a common word riddle.

Answer 1

You are

DEAR

Me, I am an introduction

Letters often start with the greeting "Dear <name>"

My anagram is past tense of what you are doing now.

READ is the past tense of reading, which I was doing while reading the riddle.

The homophone of my anagram is used with it in a common word riddle.

RED is a homophone of READ, which is used in the newspaper riddle

What is black and white and red all over?