Reason for a food recall (1,4)
I believe the answer is:
e coli
'reason for a food recall' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for e coli that I've seen before include "Cause of internal problem" , "Gut bugs" , "cause of illness" , "Cause of infection" , "Bacterium found in the gut" .)