Second place to bury shard (8)
I believe the answer is:
splinter
'shard' is the definition.
(I've seen this before)
'second place to bury' is the wordplay.
'second' becomes 's' (common abbreviation).
'place' becomes 'pl' (abbreviation used in postal addresses).
'to bury' becomes 'inter' (to inter is to put into the ground).
's'+'pl'+'inter'='SPLINTER'
(Other definitions for splinter that I've seen before include "Element in diamond" , "Thin sliver of wood" , "Sliver of wood or glass, painful in flesh" , "Sharp wood fragment, painful in flesh" , "Sliver of wood, sore in the flesh" .)