What clause although you sing well?

It seems like you're asking for a clause that contrasts with "although you sing well".

Here are a few examples:

* "Although you sing well, you lack stage presence."

* "Although you sing well, you haven't had any professional training."

* "Although you sing well, you haven't been able to find a band that appreciates your style."

* "Although you sing well, you get stage fright."

These clauses all introduce a contrasting idea, highlighting a challenge or limitation despite the person's singing ability.

Let me know if you have something else in mind!