I haven't seen this one answered yet and it's all I have left: 7dn, small person - I have T?T?H. I thought of "tetch" but the online dictionaries as well as my huge print one say there is no result (i.e. no such word) although I'm sure I've heard that word used as "a small amount" as, for example, "it's a tetch too ."
The first "t" is from 5ac/sheltered, the second "t" is from 14ac/letter-perfect, and the "h" is from17ac/housekeeper, so I think the letters I have are correct.
Sorry for being too wordy... I'm thinking aloud.