Bits and pieces left of no importance (7)

I believe the answer is:

trivial

I'm a little stuck... Click here to teach me more about this clue!

'bits and pieces left of no importance' is the definition.
I can't tell whether this definition defines the answer.

'bits and pieces left' is the wordplay.
'bits' becomes 'trivia' (I can't explain this - if you can you should give a lot more credence to this answer).
'and' is a charade indicator (letters next to each other).
'pieces' indicates taking the first letters (I've seen 'piece of' mean this).
The first letter of 'left' is 'l'.
'trivia'+'l'='TRIVIAL'

Can you help me to learn more?

(Other definitions for trivial that I've seen before include "Trifling" , "Very easy" , "Inconsequential, too minor to be bothered about" , "Popular board game" , "Banal" .)

I've seen this clue in The Globe and Mail.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.