King using lotion a great deal (7)
I believe the answer is:
kiloton
'a great deal' is the definition.
The answer and definition can be both quantities as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'king using lotion' is the wordplay.
'king' becomes 'K' (abbreviation for king in chess).
'using' is an anagram indicator (the letters used in a different way).
'lotion' anagrammed gives 'iloton'.
'k'+'iloton'='KILOTON'
Can you help me to learn more?
(Other definitions for kiloton that I've seen before include "Explosive yield measure" , "Atomic bomb unit" , "It could cause a big explosion" , "Unit for explosive force" , "blowing power" .)