micky666 - Perhaps bananabean will give you a better answer to 7ac as he's solved that clue. For what it's worth, my answer is SET, a treble definition -
1) 'Amiable people generally engaged'
2) 'Company' (in this case a dance company).
3) ------
My memory might be playing tricks on me, but I think this setter has used the huge Chambers entry for 'set' in this way in the past.
It's a poor answer to a bad clue if it's right, and clearly unfair for a clue that can only be cold-solved.
I didn't like this phrase in the preamble either -
'...how ten answers must be treated'.
Treated? How are they treated?
I did like the basic idea though.