Career fortunate for Veronica (9)
I believe the answer is:
speedwell
'veronica' is the definition.
(speedwell can mean a veronica plant)
'career fortunate' is the wordplay.
'career' becomes 'speed' (career can mean to run or rush around).
'fortunate' becomes 'well' (similar in meaning).
'speed'+'well'='SPEEDWELL'
'for' acts as a link.
(Other definitions for speedwell that I've seen before include "Small creeping herbaceous plant with blue or pink flowers" , "Small blue flower of the genus veronica" , "bloomer?" , "Small plant, veronica" , "Flowering plant" .)