you can bet a little less on the pot, and still give draws bad odds. about 2/3 pot is good here, since you are out of position.
It is weak tight, but I probably check/fold the turn. the flush draw just got there,(as well as a possible straight) in case you weren't beat on the flop.
Realize many players will try to slowplay the flush, so a bet won't tell you much.
Also, any bet effectively pot-commits you after your huge bet on the flop.