Reckoning device (6)
I believe the answer is:
abacus
(Other definitions for abacus that I've seen before include "means of multiplying" , "Early counting-frame" , "not something we now count on" , "Counting machine" , "It might work out" .)
I believe the answer is:
abacus
(Other definitions for abacus that I've seen before include "means of multiplying" , "Early counting-frame" , "not something we now count on" , "Counting machine" , "It might work out" .)