Definitions for all the solutions are normal, but some of
them require a positive/negative switch (or vice versa)
before entry in the grid, as indicated in their clue’s
wordplay
How many are changed? So far I have 6...
16d Some music died in a little composition of the 60's (8) ??T?????
5d Artist frames outstanding old chap with shaved head (4,4) ???O?Y??