Keen to eat mashed suet, eating nothing French (8)
I believe the answer is:
esurient
'eating nothing french' is the definition.
I can't tell whether this definition defines the answer.
'keen to eat mashed suet' is the wordplay.
'keen' becomes 'rien' (I can't explain this - if you can you should believe this answer much more).
'to eat' indicates putting letters inside (word on the right has word on the left to eat).
'mashed' indicates anagramming the letters.
'suet' anagrammed gives 'esut'.
'rien' placed within 'esut' is 'ESURIENT'.
Can you help me to learn more?
(Other definitions for esurient that I've seen before include "Rapacious" , "Hungry, greedy" , "could eat a horse" , "Hungry; retinues (anag.)" , "Greedy; ensure it (anag.)" .)