Consume a greatly-reduced amount? (3)
I believe the answer is:
eat
'consume' is the definition.
(eating is a kind of consuming)
'a greatly-reduced amount?' is the wordplay.
'a greatly-reduced' becomes 'e' (I can't explain this - if you can you should believe this answer much more).
'amount?' becomes 'at' (at is a kind of amount).
'e'+'at'='EAT'
Can you help me to learn more?
(Other definitions for eat that I've seen before include "Devour" , "put away" , "Be corrosive" , "Do cats - bats? Do bats - cats? (Alice in Wonderland)" , "Scoff" .)