Tidy number consumed (6)
I believe the answer is:
neaten
'tidy' is the definition.
(I know that tidy can be written as neaten)
'number consumed' is the wordplay.
'number' becomes 'n' (n can represent any number).
'consumed' becomes 'eaten' (similar in meaning).
'n'+'eaten'='NEATEN'
(Other definitions for neaten that I've seen before include "Spruce up" , "Make tidy" , "Straighten up" , "Trim" , "Groom" .)