Heavy extract of plutonium (3)
I believe the answer is:
ton
'heavy extract' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'of plutonium' is the wordplay.
'of' indicates a hidden word.
'TON' is hidden within 'plutonium'.
Can you help me to learn more?
(Other definitions for ton that I've seen before include "Two thousand - two hundred and forty pounds" , "2240lbs" , "Unit of weight equivalent to 20 cwts" , "A slang 100mph - heavy" , "100 mph, runs, etc" .)
