Are the clinging aggregates the cause of clinging after death?
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