1) What usually follows this construction: 'less/more' X than it is Y'?

2) Is it usually an adjective phrase? What about a noun phrase like a?

a) Dancing is less a sport than it is an art.

b) Dancing is less difficult than (it is) enjoable

3) Is it a comparative clause?

Peter played as well as he has ever played

4) What does this comparative clause in bold modify? (the adverb as or the adverb well)?

Thank you
Peter played as well AS HE HAS EVER PLAYED (WELL).

I think that the comparative clause modifies the first "as."

Peter played as (= to the degree) well as ( = in which) he has ever played (well).

Peter played well (to the degree) (in which) he has ever played (well).

Peter played as (as he has ever played (well) ) well.
How did Peter play? - He played well.

How well did Peter play? - He played as well as he has ever played.

That`s the manner Peter played.

So as well as he has ever played is a manner clause, no comparative.
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Your post is less well-organized than usual, 1b3.

1-3) What usually follows this construction: 'less/more' X than it is Y'? Is it usually an adjective phrase? What about a noun phrase like a? Is it a comparative clause?

a) Dancing is less a sport than it is an art.

b) Dancing is less difficult than (it is) enjoyable. (This seems to mean that it is easy but not very enjoyable. Is that what you intend?)

c) Peter played as well as he has ever played.

Yes to all.

4) What does this comparative clause in bold modify? (the adverb as or the adverb well)?-- The comparative phrase is 'as well as', leaving 'as well as he has ever played' to modify 'played'. I'm not sure that you can segment the comparative phrase except to say that 'as...as' is a correlative conjunction.
Hi, MM,

I wrote this post over a year ago. Perhaps you ignored it until now, for that very reason--it's poorly constructed.

Cheers
Ah, it's from 1b3's Early Period.

No, I didn't ignore you before; I just didn't see it. The Anon post before mine attracted my attention as it passed through Moderation 4 days ago.
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Haha, my early period.

The way you said that makes me think I'm famous on this forum or something.