d Possibly 50 musicians or 100 — that guy’s creative work is revolutionary (9)
I did like this, many moons ago When Mama Bee was introducing me to crosswords she had a list of common anagrams, CARTHORSE being one of them. Start with OR from the clue add the Roman numeral for 100 a contraction of he has, and a reversal (revolutionary) of a piece of creative work, create a group of musicians who may or may not be 50 in number (possibly)
Daily Telegraph 29992