Thank you, Grandad.
I can't tell you for how long I have looked at two other Ts together to no avail.
I assume you have 'Hattie' from 6d and 17d. The first letter of my 17d is S, so I would need to find alternatives for both my 17d and 16a (of which I am fairly confident).
It would help a lot had we been told how many letters this ungrateful lady has!
...Ah, now I see!!! - But I will post this to you anyway!