Figure you grind down (8)
I believe the answer is:
thousand
'figure' is the definition.
(I've seen this before)
'you grind down' is the wordplay.
'you' becomes 'thou' (historical second person pronoun).
'grind down' becomes 'sand' (I can't explain this - if you can you should believe this answer much more).
'thou'+'sand'='THOUSAND'
Can you help me to learn more?
(Other definitions for thousand that I've seen before include "Ten cubed" , "See 1 down" , "a couple of monkeys in total?" , "in MCC, but missing double century" , "See 19 Across" .)