Ace high flush draws automatically give you 13 outs on the flop to beat a 1 pair hand
Thats provided you hit the flop!!!
Its certainly worth playing but only in late position and its a hand you want to raise with.
Its not really a hand to cal a raise with, but a preflop raise makes it easier to take the pot down with a c-bet.
By playing it in late position you can see if anyone shows any signs of agression before you bet.
And like c9 said, if you do hit the flop, its a good drawing hand.