Ranger & Druid staff
You have to have the elite spec selected as one of your 3 active
You need to have the first Druid trait unlocked and to have the Druid traitline selected as your third trait (note: Elite Specialisations cannot be selected in trait lines 1 or 2, only on 3).
Same applies to equipping Glyphs; the Druid specialisation needs to be “equipped”.
Got it all worked out now, thanks for your help peoples.