Have finally caught up after a late start. 2 left!
Dry atomic nitrogen in home-made gas plant(7) D*T*A**
and
A philosopher?Yes, that's right(4) ***R
Then I can put it to bed. With your help....
The TLS crossword is no longer a literary one, sadly. It was once but this is an illustration that all change is not necessarily progress. The Literary Monthly might provide a better crossword.