23a Martin worked with uranium and sodium, formerly (7) N---I--
26a Odd warden joins party (9) S-R---A--
19d Use me to overturn stratagem (6) -----Y
24d He draws a building (5) ----R...
23a High-level computer programming language developed in Europe in the 1950s, used especially for scientific and mathematical applications (5) A---L 14d Metrical or rhythmic stress in verse feet, as...