Can anyone help, stuck on a couple
27a treating eg. spent nuclear fuel for reuse (12) ???n?c?s?ing
13d means of maintaining standards (7,7) ?u?s?t?/control
21d Short play (3,5) o??/?c?e?
29d saved up sums (4,4) ?e?t/?g?s
Probably thinking on completely the wrong tangents!
Many thanks in advance