Got a problem as clue for 13a states 8 letters but the grid has 10 letters. Also the logic does not make sense to me.
13a. Arrangement take in diploma ring ???N?E?L?D
Could be FLANNELLED or CHANNELLED
11d. ....went boldly sounding rythmic (8.4) ???P?O?Y ?L??
Thinking RHAPSODY ?L?? as that would provide H for CHANNELLED in 13a.
16d. Moveable wire made up ill temper (8) ?H??????