ACROSS
8 Block of buttons for entering digits into a computer or other device (6)
9 Vegetative component of a fungal colony (8)
10 Garrulous, flocking songbird, Sturnus vulgaris (8)
11 Units of 25.4 millimetres (6)
12 Eighth prime number (8)
13 Common name for a road-surfacing substance patented in 1902 (6)
14 Canadian physicist, 2018 Nobel laureate (5,10)
18 Of an isotope, not radioactive (6)
20 Variety of actinolite, Ca2(Mg, Fe)5Si8O22(OH)2, sometimes called jade (8)
23 Colour at one end of the visible spectrum (6)
24 Text or image…
