One kind of engineering (7)
I believe the answer is:
genetic
'one kind of engineering' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for genetic that I've seen before include "Pertaining to heredity" , "Like type of code" , "Passed down from a previous generation" , "(The code) of our DNA" , "relating to origin" .)