Precipices (6)
I believe the answer is:
cliffs
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">precipices</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cliffs that I've seen before include "High, steep rockfaces" , "Sheer rock faces overlooking sea" , "Dover has white ones" , "Precipices" , "High steep rocks" .)