Restaurant smothers recipe with gravy (6)
I believe the answer is:
bistro
'restaurant' is the definition.
(I know that bistro is a type of restaurant)
'smothers recipe with gravy' is the wordplay.
I cannot quite understand how this works, but
'recipe' could be 'r' (abbreviation in medical prescriptions) and 'r' is found within the answer.
The remaining letters 'bisto' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bistro that I've seen before include "Small bar-cum-restaurant" , "A small informal restaurant from France" , "Small French bar and restaurant" , "somewhere to eat" , "Cafe bar" .)