https://imgur.com/a/71QG1Cb

https://www.wowhead.com/item=6689/wind-spirit-staff#dropped-by

Wind Spirit Staff should drop under Hunter Bonetusk

FYI the "item removed from game" tag on wowhead is wrong

Hilariously, 2 minutes after writing this issue it dropped from trash. So I suppose wowhead is incomplete for that item. The dungeon journal says the staff drops from Bonetusk though

Wowhead is wrong. It used to drop from a rare in the instance, who was removed during Warlords of Draenor. The item was moved to a zone drop in the instance at the same time.

This has Hunter Bonetusk and Kraulshaper Tukaar (trash mob) listed as source creatures in ATT, you should see it in the tooltip of the item (might need to turn on some setting).