Unclued lights are ten words taken from a poem quoted in ODQ. The poet’s name (two words) will appear diagonally in the completed grid and must be shaded.

Across

1 Raise a fuss about street urchins (8)
11 Mercury, say, in the sky (7)
12 Joanna shrinks following advance of insects (5)
13 Musician’s fine whenever accompanying royalty (5)
15 Bug and grub infesting section of plants (7)
17 Conceivably producer of fine service tree (4)
19 Drink last short (5)
23 Room behind...