Not a Cretan drink but one well worth searching out if not on Crete then perhaps on the mainland.
I was in Mystras a few weeks ago and was given Mastiha or Mastica as an after dinner drink. Similar to a shot of Raki but a sipping drink, take your time with it. A nice pine resin type flavour but complex. Made in Chios I think. Mr Google will give you all the answers.
Worth searching out and worth buying a bottle at the airport.(for the winter)