Deciduous large bush. Hardy to zone 8.
Help me ID this please.
A species of either Rhus or Pistacia
Those flowers (buds) and the older wood look like Pistachio but I have no knowledge of the Rhus other than it has bright red foliage.
Resin do you know if the Rhus has similar flowers?
Yes, fairly similar flowers (and both genera are native in the eastern Mediterranean, which is why I'm not wanting to pin it down to which genus!). Might be easier when the leaves are fully expanded.