E-mail Cal about the flowering shrub (8)
I believe the answer is:
camellia
'e-mail cal about the flowering shrub' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for camellia that I've seen before include "Shrub related to tea plant" , "Flowering shrub for Mal and Celia, oddly" , "Ornamental shrub with rose-like flowers" , "10" , "Make the flower from strange lace mail" .)