Included among possessions - a bottle-opener, a wooden shoe (5)
I believe the answer is:
sabot
'a wooden shoe' is the definition.
(I've seen this before)
'included among possessions a bottle-opener' is the wordplay.
'included among' indicates a hidden word.
'SABOT' is hidden within 'possessions a bottle opener'.
(Other definitions for sabot that I've seen before include "French clog" , "This from last" , "sole support?" , "Wooden-soled 13 down" , "Boast about wooden shoe" .)