If you have 4 clubs to start:
First to act, 84.4%
2nd to act and the player to your right played a club flush, you are still 58.6% to draw at least 1 club over 8 cards.
3rd to act and you see 6 clubs on the table, you are 53%
last to act and you see 6 clubs on the table, you are 59.2%