Times Cryptic Jumbo 1610 – 22 April 2023. Not 17 or 51

Hello all.  This felt a bit different to the average beast, with a few unusual devices in the mix.  When writing it up I did also notice lots of cryptic definitions and double definitions (five of each at a quick count but I haven’t double-checked).  I finished in under an hour but was concentrating pretty well throughout.  Good fun – thanks setter!