Crossword Genius

How to refer to a man hiding away tons? (5)

Ross

I believe the answer is:

miser

'tons?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

I can't explain the rest of the clue.

(Other definitions for miser that I've seen before include "Niggard" , "Cheeseparing person" , "One's tight" , "Pinchpenny" , "Wealth hoarder" .)

I've seen this clue in The Times.
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