stumped on two - or i have something wrong! any help please 19d) fast (5) t-g-s 16d) hollow (6) -e-e-t that is assuming I have 23a correct - tenacious (10 - relentless
19d - looks like tight.
if your s is the last letter in tenacious, then I think you are wrong .for tenacious I would think that persistent would be better