Crossword Genius

New question about supermarket exchange (6)

Ross

I believe the answer is:

nasdaq

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

'exchange' is the definition.
(I've seen this before)

'new question about supermarket' is the wordplay.
I cannot really understand how this works, but
'new' could be 'n' and 'n' is found in the answer.
'question' could be 'q' and 'q' is found in the answer.
'about' could be 'a' (abbreviation in Chambers) and 'a' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for nasdaq that I've seen before include "American stock market" , "Computerised US stock market" , "[STOCK EXCHANGE]" .)

I've seen this clue in The Telegraph.
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