Hi Cockie. I'm sorry, I should have added a comment sooner, to the effect that my conjecture from yesterday evening was simply that, and nothing more. Lettuce didn't work very well in that position since I would have needed a down entry of *US*, and the only down U I've so far found is in Outbreed. 'Vying' was a game changer, because I don't have any other Vs from across clues, so it is favourite to hang off the V of Attractively. In which case Pyrotechnist cannot be close by.
In the absence of forum help re positioning, perhaps we can co-operate in another way. Do you have any other answers with H, other that Pyrotechnist and Reishi, likewise do you have any other answers with V ? Also I have just one of each (across & down) with B. Do you have any others ?