Cryptic crossword No 1,828

No prizes for guessing the theme of this puzzle 😅 but full explanations and spoilers can be found in the reply to this comment…

LOI the nho 6a and, whilst I solved, I do not have the GK for 10d or 8d (which possibly needs a US indicator?) I also know basically nothing about Ed Sheeran which did not prevent the solve but hampered the understanding. You've done a thorough job, looking at the Annotations, and I am sure fans will appreciate the treatment. 8a, 9a, 19a, 21a, 3d and 14d my favourites. Thanks. PM