Dash, it's rough being an ambitious type! (9)
I believe the answer is:
careerist
'an ambitious type' is the definition.
(I've seen this before)
'dash it's rough' is the wordplay.
'dash' becomes 'career' (I can't explain this - if you can you should give a lot more credence to this answer).
'rough' is an anagram indicator (a rough or broken ordering of the letters).
'its' anagrammed gives 'ist'.
'career'+'ist'='CAREERIST'
'being' acts as a link.
Can you help me to learn more?
(Other definitions for careerist that I've seen before include "Ambitious worker" , "Maybe workaholic" , "Ambitious type" , "he wants to get on" , "Ambitious person" .)