LOL, it's Tamine countess, and it's not listed as obsolete by Wiktionary, The Free Dictionary or Encyclo.co.uk (English Encyclopedia).

At first the compound was for tammy.

(6 letters)

At first the - T

compound - amine

was for tammy - Tamine

Tamine

amine

chemical compound

Any member of a family of nitrogen-containing organic compounds that is derived, either in principle or in practice, from ammonia (NH3).

Britannica

Tamine

Noun

Tamine (countable and uncountable, plural tamines)

Alternative form of tammy (“type of woollen cloth”)

Wiktionary

To be honest, I'm not too keen on obsolete words being used unless it is indicated in the clue. I think I have chosen obsolete words a couple of times in the past (in this thread), but have included the word "old" to indicate obsolete. Now I have given away a strategy. But it somewhat depends on the reference source (Website) used for the definition. And we don't know which sites each of us are referencing for meanings etc. Although I do know you like OED. 😜

I took a look at the OED definition of "Tamin" which is listed as obsolete. "Tamine" is a Form. To be fair, I looked at definitions of Tamin and the first site I checked (English - Collins Dictionary) listed it as obsolete. Even Spell Check for this post is underlining Tamin as needing correction (but not Tamine). I have searched three pages of Mr Google's definitions for "Tamine" and could not find a source stating it is obsolete.

Hope you are feeling better soon countess. 🙂

Play it?