Crossword Genius

Vegetables, with lots of people in line for them, we hear; mind them? (2,3,2)

Ross

I believe the answer is:

ps and qs

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

'lots of people in line for them we hear mind them?' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'vegetables with' is the wordplay.
I cannot quite understand how this works, but
'with' could be 'and' and 'and' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for ps and qs that I've seen before include "they could need minding" , "Correct social manners" , "Letters" , "one might mind" .)

I've seen this clue in The Times.
Want a hint initially instead of a full solution? Install my app