Well cooked crab I ate — it could make one sick (8)
I believe the answer is:
'make one sick' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'well cooked crab i ate it' is the wordplay.
'crab i ate' anagrams to 'BACTERIA'.
Though, I am unsure how this is indicated.
'could' acts as a link.
Can you help me to learn more?
(Other definitions for bacteria that I've seen before include "Microscopic organisms, good and bad", "Microorganisms that can cause disease", "Single-celled organisms", "Single-cell organisms, can be good or bad for you", "Infectious microorganisms".)