Scientific feat from medic tracking blood types (1-4)
I believe the answer is:
a-bomb
'scientific feat' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'from medic tracking blood types' is the wordplay.
I cannot really understand how this works, but
'from' could be 'o' (I've seen this in other clues) and 'o' is present in the answer.
'medic' could be 'mb' (Bachelor of Medicine) and 'mb' is found in the answer.
The remaining letters 'ab' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for a-bomb that I've seen before include "explosive" , "deterrent" , "Nuclear weapon" , "Killer" , "Weapon of mass destruction" .)