Could this plant give Mam E coli badly? (8)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
camomile
(Other definitions for camomile that I've seen before include "Plant for tea or lawn" , "Medicinal herbal tea" , "Fragrant plant" , "Herb used for tea" , "Herb for tea (or lawn?)" .)