Make less food, consuming little (8)
I believe the answer is:
diminish
'make less' is the definition.
(I've seen this before)
'food consuming little' is the wordplay.
'food' becomes 'dish' (dish is a kind of food).
'consuming' means one lot of letters goes inside another.
'little' becomes 'mini'.
'dish' going around 'mini' is 'DIMINISH'.
(Other definitions for diminish that I've seen before include "make shorter" , "sink" , "Become smaller or less" , "Make reduction" , "Make or become smaller" .)