Crossword Genius

Ferret food (4)

Ross

I believe the answer is:

grub

I believe this is a double definition.

'ferret' is the first definition.
(synonyms)

'food' is the second definition.
(grub is a kind of food)

(Other definitions for grub that I've seen before include "Dig - maggot - food" , "Caterpillar - food" , "Larva; dig shallowly" , "Gentle, food" , "ferret > eats" .)

I've seen this clue in The Times.
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