Splinter (6)
I believe the answer is:
sliver
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">splinter</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sliver that I've seen before include "Narrow sharp fragment" , "Thin sharp bit, of wood say" , "Small thin sharp piece" , "Shard" , "Thin fragment or slice" .)