Would-be fancy car filled by Bobby (2-2-2)
I believe the answer is:
la-di-da
'would-be' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I can't see?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for la-di-da that I've seen before include "Pretentious, snobbish" , "Informally, having affected manner of pronunciation" , "Stuck-up" , "I'd a lad with affected manner or pronunciation" , "Hoity-toity" .)