People importing pine possessions (10)
I believe the answer is:
belongings
'possessions' is the definition.
(belonging is a kind of possession)
'people importing pine' is the wordplay.
'people' becomes 'beings' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'importing' is an insertion indicator.
'pine' becomes 'long' (to pine for something is to long for it).
'beings' placed around 'long' is 'BELONGINGS'.
Can you help me to learn more?
(Other definitions for belongings that I've seen before include "Personal effects" , "property" , "stuff" .)