What is the difference between craving and clinging?
Craving is when the baby reaches with desire for the pacifier and clinging is when the baby has the pacifier and won't let it go.

To distinguish craving from clinging, Buddhaghosa uses the following metaphor in this source:


  "Craving is the aspiring to an object that one has not yet reached,
  like a thief's stretching out his hand in the dark; clinging is the
  grasping of an object that one has reached, like the thief's grasping
  his objective.... They are the roots of the suffering due to seeking
  and guarding."