Container of some of one's vital personal possessions (5)
I believe the answer is:
chest
'container' is the definition.
(chest is a kind of container)
'some of one's vital personal possessions' is the wordplay.
'some of' says to take the centre (I've seen 'some' mean this).
'one' becomes 'ace' (ace has a value of one in some card games).
'vital personal possessions' becomes 'hest' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The central letter of 'ace' is 'c'.
'c'+'hest'='CHEST'
'of' is the link.
Can you help me to learn more?
(Other definitions for chest that I've seen before include "It's enclosed by the ribs" , "drawers in it!" , "Bra on it" , "Strong box; thorax" , "Upper trunk" .)