OK well at the risk of sounding like an amateur painter presented with a description of a fine Constable who says 'I've done one like that' . . . I've done some like that.
The effect relies, I think, on a combination of synthetic ambergris, sandalwood, vanilla, a little vetiver, tobacco and basil. I don't think you need cedar, though it can work with that too - natural or synthetic.
You can emphasise it further using Iso E Super, but you don't need any to get the effect.
Now it is of course entirely possible that what I'm thinking of here isn't what you are detecting in Creed's vintage offering at all (I've not smelt it) in which case I apologise for showing off . . .