An animal left one with a flower (8)
I believe the answer is:
camellia
'flower' is the definition.
(I've seen this before)
'an animal left one with a' is the wordplay.
'an animal' becomes 'camel' (I've seen this before).
'left' becomes 'l' (common abbreviation).
'one' becomes 'i' (Roman numeral).
'with' says to put letters next to each other.
'camel'+'l'+'i'+'a'='CAMELLIA'
(Other definitions for camellia that I've seen before include "10" , "Shiny-leaved shrub" , "Shrub related to tea plant" , "Claim ale from the flowering shrub" , "Ornamental shrub with rose-like flowers" .)