European motorbike company supported by viable training (9)
I believe the answer is:
education
'training' is the definition.
('education' can be a synonym of 'training')
'european motorbike company supported by viable' is the wordplay.
'european' becomes 'e' (abbreviation e.g. EU).
'motorbike company' becomes 'ducati'.
'supported by' says to put letters next to each other (letters go below - in down clue).
'viable' becomes 'on'.
'e'+'ducati'+'on'='EDUCATION'
(Other definitions for education that I've seen before include "an answer to all clues, initially" , "Theory and practice of teaching" , "Culture" , "Blair's triple mantra" , "Teaching - knowledge" .)