use quest clicky keybind?
 

would it be possible for a mod to allow a "use quest item" keybind?

Two problems

1. The API doesnt provide any keybinding abilities

2. Quest items tend to go into the quest bag, and you cannot /use items from there via scripts

bummer, ok how about increasing the size of the clicky part that show in the quest tracker?

I know of just one way; resizing your quest tracker frame, that will re-size the quest item button.

Edit: You should be able to drag and drop the quest item onto your action bar and assign it a keybind, for faster and easier access, but I know this doesn't solve the easy of use that you really want, but it's the best thing you can do for now.