All answers to the clues below contain the letters T-U, followed by a third letter. The third letters are in alphabetical order.
1) On schedule. Punctual (anon for this)
2) Antique versions of this often had claw feet. Bathtub (anon for this)
3) A vegetarian head. Lettuce (am yisrael chai)
4) Sherlock Holmes first book. A Study In Scarlet (am yisrael chai)
6) Cornbread is often used for this. Stuffing (anon for this)
9) Reward for good service. Gratuity (am yisrael chai)
11) WWII German warplane. Stuka (am yisrael chai)
12) Famous Dutch flower. Tulip (anon for this)
13) Campaigning (politically). Stumping (anon for this, am yisrael chai)
14) This compound is one of the hardest substances known to man. Tungsten Carbide (am yisrael chai)
15) Slick and insincere. Unctuous (am yisrael chai)
17) A type of hat (I never heard of this word, I Googled it for this list). Toque (am yisrael chai)
22) The world’s first metalsmith. Tuval Kayin (anon for this)
23) Famous Bronte book * Wuthering Heights (anon for this)
24) Upstate NY town Tuxedo (am yisrael chai)
25) NY Governor (predates either Cuomo). Peter Stuyvesant (anon for this)
can’t stump this crowd, can we?