The two pans, of a balance (6)
I believe the answer is:
scales
(Other definitions for scales that I've seen before include "Climbs the weight measuring device" , "Weighing machine" , "Pair of balances" , "Richter etc?" , "Balance - climbs" .)
I believe the answer is:
scales
(Other definitions for scales that I've seen before include "Climbs the weight measuring device" , "Weighing machine" , "Pair of balances" , "Richter etc?" , "Balance - climbs" .)