Thank you, Cheryl!

Fiddler taking six out on walk to see gymnast (12)

Corrected:

Direct on the right - ccvccvcvcvcc - only two letters repeated

Please see above correction

... and an extra hint: wordplay 5 + (9-2)

More hints?? - Try this https://www.youtube.com/watch?v=wP7VU6AVIgc

The fiddler would be a violinist, taking six out...

Would give us tramp - olinist

Well fiddled: take a bow, or at least the Belt! ====[**CDM***]===

Hmmmmm. What clued tramp's location?

I assumed the "on" - olinist on tramp

If I'm wrong, can we have the noodles, Miss - please Miss? Haven't had the noodles since the days of Denis

Thanks, Lex!

Huge mat is orderd for excessive unionist (8)

Direct on the right...

Noodles??

Rog's justification was correct in my view (it was a clue from elsewhere), and not unusual use of "on."

It's tough to deal with the relaxed rules of a British-style cryptic. "On" does not place "tramp" first, it places it last. But this is Lex, not Denis, so no noodles today, just a red flag.

*puts noodles on shopping list*

Bigamist

Huge = big
mat is (ordered) = amist (anag)

I hereby pass you this magnificent belt, Cheryl! ====[**CDM***]===


That's very bigamy...

Good one, Rog!

One learned leader in flowers and molds (6)

Direct on right. 2 vowels.

cvvccc

Bu(il)ds = moulds

Revisiting the use of "on," I think that in British puzzles it can denote a previous or subsequent position but in the case of a down clue possibly more often previous (on top of rather than added on)

I built this belt for you, Kevin! ====[**CDM***]===

Thank you Cheryl, it feels fully moulded to my contours!

Freedom in empty pretentious truisms (10)

Direct on the right ccvcvcvcvc only one letter repeated

Wordplay 8 inserted into 11- 9

What, still no takers??

Empty the word pretentious and insert a word for freedom/room to manoeuvre...

With the help of that nice thesaurus.com:

p latitude s