Geometric cryptic

[Harry_the_cat]

Tea mixed with sour donut. (5)

 

[mmm4444bot]

** TORUS **

I expect you'll be hearing from Denis …

 

[Denis]

Illegal!!!
If t = tea, then you need a position indicator (like first tea)
or a homophone indicator (like heard tea) ...agree Sir Marcus?

 

[Harry_the_cat]

** TORUS **

I expect you'll be hearing from Denis …

I thought so!

 

[Harry_the_cat]

Illegal!!!
If t = tea, then you need a position indicator (like first tea)
or a homophone indicator (like heard tea) ...agree Sir Marcus?

Yes, I thought that might have been an issue. I think I'm better at solving them than composing them.

 

[mmm4444bot]

...agree Sir Marcus?

Yessir.