24a) What cinema promotes is of some importance (7)
A-A-R-M
27a) Something written about in poem, new spins on certain verb forms (3-6)
N-N/-I-I-E
10a, 2d) Standard of jazz worried Spike, ladies and gentlemen, by the sound of it (5-3,5)
E-G-T/-A-/B-U-E-
Must be "eight bar blues = a jazz standard". Please explain the solution.