Small rounded stones (7)
I believe the answer is:
pebbles
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small rounded stones</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pebbles that I've seen before include "Small rounded stones" , "Small round stones, as on beach" , "Small, smooth, rounded rocks" .)