Thanks for all your entries; reading through them I was reminded of Young Mr. Grace. For possible winners I was looking for clues that I would have a chance of solving without knowing the answer (but possibly needing a crosser). Although there were other excellent clues that fitted the bill in the end I kept coming back to one clue which I thought both succinct and very clever, post # 11 from bigbadmarty2, and I declare it this week’s Top Trump.
Sign on staff for a bit longer than usual (7)
Here is your prize
https://www.youtube.com/watch?v=3jBsPlgpKgg
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