Seven Days
2d,decay,?l?g?t
36d,equivalence and regularity,s???e?r?
39d,fish with a barbed tail,s???????
41d,scrap,???????
44a,large four legged tropical reptile,7,6,??n?t?r,??????
46d,of elementary particles,??????
48a,space to stretch out,l??????
50a,hopeless recklessness,d?s?e??????