you can count on them (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">you can count on them</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 abaci that I've seen before include "You can count on them" , "Counting devices" , "frames" , "They once reckoned" , "on which people may be counting?" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">you can count on them</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Another definition for fingers that I've seen is " Digits".)