You are overvaluing a non-premium wrap on a flushing board. Flush draws own straight draws, in this case he didnt have one, but there is no point betting out at this stage in an SNG. Ur not "protecting ur hand" u don't even have one, check call if you must see a turn, but any straightening club isnt great either. I imagine he would make it clear he was scared of the flush at this level, but again he might not be good enough to fold. I saw u've just started learning PLO from the other board, don't go crazy cos u now have 13 out straight draws and the like when there are flush draws + made hands and the like you could be up against.
You know the SNG deal anyway, don't go broke light early. This is going broke light.
good advice.
Your hand has no raising power in a multiway pot, and re raising is horrible, chances to be up against someone freerolling on the turn if you make your hand anyway.
you can call a bet but not raise yourself (a late position bluff might be ok but mostly take the free card)
If you held the nut flush draw also then driving the betting would be ok.