Bit disappointed that I had to use "use" and "help" since they mean the same thing and the (intended!) fun of this wall is that the prepositions all used in vastly different ways in the various phrases, so I'll be interested if anyone has any other "of" suggestions

Clever grid but of course I can't help with your request

fair enough- certainly of interest !

Of late, I've found simply typing into Google and seeing what comes up beginning with different letters to be most efficacious