If you have the ace, it doesn't matter what kicker you have, you will have the nut flush - thus win.
If the ace of clubs was on the table, then it would depend on who has the highest club in their hand.
So lets say you had an ace of diamonds and a jack of clubs and your opponent has ace of spades and queen of clubs and the board has 7/2/A all clubs, then your opponent would win at show down with a better flush because the queen is higher than your jack.
Remember, you make up the best possible five card had possible with your hole cards and the board so your cards value, even with an "ace high flush" still count.