Crossword Help Forum
Forum Rules

9d Row of vehicles, factories etc (5,9) - - - S - P - L - - - - - -

21a One unpredictable character following VW (7,8)
- - - - O - N - - - - - I - Y

23a This still gets used by race officials (5,6)
- - - - O - I - - - -

9 Noise pollution

21 Unknown Quantity (XYZ)

23 Photo Finish ???

A still can be a Photo and to get used could be finish off.
But I'm not convinced, so pencil it in.

Thank you all , finally any ideas on
18a Positions offered by big name at Apple (4) - O - S

(Steve) Jobs.

Of course , obvious now - excellent , thank you