Plump sumo wrestler eats a significant amount (4,3)
I believe the answer is:
lump sum
'a significant amount' is the definition.
The definition suggests a singular noun which matches the answer.
'plump sumo wrestler eats' is the wordplay.
'LUMP SUM' is hidden within the letters.
However, I am not sure how this is indicated.
Can you help me to learn more?
(Other definitions for lump sum that I've seen before include "Single cash payment" , "Single payment as opposed to a number of smaller ones" , "Whole payment" , "one lot of money" , "Single payment as opposed to many instalments" .)