Without imagination, supermarket replaces legend's recipe (8)
I believe the answer is:
stolidly
'without imagination' is the definition.
(stolid means impassive or without imagination)
'supermarket replaces legend's recipe' is the wordplay.
I cannot really see how this works, but
'supermarket' could be 'lidl' (Lidl is a supermarket) and 'lidl' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for stolidly that I've seen before include "Without feeling" , "Showing no interest" , "without great enthusiasm?" , "Impassively" , "In unemotional manner" .)