Imperial unit of weight (5)
(Other definitions for stone that I've seen before include "Rock; fruit seed" , "Olive pip" , "Endocarp" , "Beryl, ruby" , "Little rock" .)
'imperial unit of weight' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for ounce that I've seen before include "Large cat" , "Small amount (of old pound)" , "A light imperial measure of weight" , "On cue (anag.)" , "Panther, perhaps" .)
'imperial unit of weight' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for ton that I've seen before include "Two thousand, two hundred and forty lb" , "2240 Ibs" , "A slang 100 mph" , "Style" , "High-speed" .)