Adjoining areas where hundreds and thousands might be gathered? (2,6)

'adjoining areas where hundreds' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'and thousands might be gathered?' is the wordplay.
I cannot quite see how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is located in the answer.
'be' could be 'suit' (suiting is a kind of being) and 'suit' is located in the answer.
The remaining letters 'ees' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?