Healthy to ingest the French meat (5)
I believe the answer is:
filet
'meat' is the definition.
(filet is a kind of meat)
'healthy to ingest the french' is the wordplay.
'healthy' becomes 'fit' (associated in meaning).
'to ingest' means one lot of letters goes inside another (inserted letters are ingested or eaten).
'the french' becomes 'le' ('the' in French).
'fit' placed around 'le' is 'FILET'.
(Other definitions for filet that I've seen before include "French cut of beef" , "Boneless tender steak in France" , "Beef undercut" , "French-style piece of meat" .)