Recipe for making unique lunch with asparagus tips (7)
I believe the answer is:
formula
'recipe' is the definition.
(synonyms)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for formula that I've seen before include "Set expression" , "Category in motor racing" , "Recipe, procedure" , "Scientific recipe" , "Mathamatical expression" .)