17a ; Transmit touching melody(5 letters) ; ? ? ? A ? ; Note: the 2nd letter is the 8th letter of 7d.
24a ; God of Light o'er all the Earth - and Earth's bounds(6 letters) ; ? ? ? I ? S ; Note: the 2nd letter is the12th letter of 7d : Note: Isiris is a God of Light but it is not spelt Isiirs(which would fit!)
7d ; Supposed reason for an evening out(3, 2, & 8 letters) ; ? A ?/ O ?/ A ? ? ? A ? ? ? ; Note: See above for 8th & 12th letters!
(I'm sure of the other answers if anyone needs them)