To expand on my original post (and with apologies for the missing word):
One clue ends with “in location of 1 8”
The rest of that clue is “Imagine his output”, and my solution is John Lennon.
Four clues end with “…in place of 1 8”.
My solutions to those are: George Best, Bob Hope, Arnold Palmer, John Wayne.
Assuming 1 8 is an internal reference it stands for “flying start”.
But what is all that about?