Clue: In France, who gets behind cook (not French) offering French dish? (6)
Answer: QUICHE
Explanation: Definition: French dish?
A charade of QUI ('in France, who') plus CHE[f] ('cook') minus the F ('not French'). In the clue, 'gets behind' seems to suggest the reverse order of the particles, but, if read as 'gets behind it', is a suitable link.