Are the clinging aggregates the cause of clinging after death? There are five clinging aggregates. 
Here it states that one's self clings to the five aggregates. To quote:


  "It's just as when a dog is tied by a leash to a post or stake: If it
  walks, it walks right around that post or stake. If it stands, it
  stands right next to that post or stake. If it sits, it sits right
  next to that post or stake. If it lies down, it lies down right next
  to that post or stake.
  
  "In the same way, an uninstructed run-of-the-mill person regards form
  as: 'This is mine, this is my self, this is what I am.' He regards
  feeling… perception… fabrications… consciousness as: 'This is mine,
  this is my self, this is what I am.' If he walks, he walks right
  around these five clinging-aggregates. If he stands, he stands right
  next to these five clinging-aggregates. If he sits, he sits right next
  to these five clinging-aggregates. If he lies down, he lies down right
  next to these five clinging-aggregates. Thus one should reflect on
  one's mind with every moment: 'For a long time has this mind been
  defiled by passion, aversion, &amp; delusion.' From the defilement of the
  mind are beings defiled. From the purification of the mind are beings
  purified.


It is clear that one clings to the five aggregates during his or her life time.
But after death the five aggregates dissolve. 

My question is : are the clinging aggregates the cause of clinging after death? (Just as one clings to his own existence after death and takes rebirth)
The last mind in previous life is anantara-cause of the after-life-mind.

The previous life, mind&amp;mind factors&amp;forms, is pakatūpanissaya-cause of the after-life.

The previous kamma is nānakkhanikkakamma-cause of the after-life.

The previous life is ārammaṇa-cause of the after-life.

All above is clinging aggregate.

Read: http://www.palikanon.com/english/sangaha/chapter_8.htm