Good thing you turned the fuel off. Over the years I have had many carburetters flood, even ones that have worked for a while. The clip can fall out of the grove in the needle or just grunge stopping the needle from seating.
After you tickle it make sure the flow stops. If it looks as if it doesn't, turn the fuel off and put it back on after the engine is running. If it is OK, fine otherwise pull the bowl cover off and investigate.
If you fit a gauze in the intake if it's the right fineness it will act as a mining safety lamp (Davey) and be a flame trap. You need to achieve a fairly large diameter so it won't make it run rich. Nev