Before you get angry with the question, I know that the the rules say "You can't use your clue to talk about the letters in a word or its position on the table".
I was just curious on a move I made if it was illegal. There were only 4 words that starts with H. The tiles were all our words, so I gave the letter H as a clue. I thought this was a once in a blue moon opportunity. What was I did just plain illegal?