Has concern about Anglo-French containers (7)
I believe the answer is:
carafes
'containers' is the definition.
(carafe is a kind of container)
'has concern about anglo-french' is the wordplay.
'has concern' becomes 'cares' (I've seen this in another clue).
'about' means one lot of letters goes inside another.
'anglo-french' becomes 'AF' (abbreviation in linguistics).
'cares' going around 'af' is 'CARAFES'.
(Other definitions for carafes that I've seen before include "Wine containers" , "Wine flasks" , "Wine-serving vessels" , "glass bottles" .)