### Clue: Do without extra small prune left over (5)
### Answer: SPARE 
 ### Explanation: Definition: Do without extra,left over
 S(abbrev. for "small') + PARE(to prune/trim/remove unwanted parts).
Double defn: 1st: …, say, mass or fat/thin; and 2 … and above what's in use. Or could it be a triple defn?