@Dutchy,
Thanks for your reply, Dutchy. In this part of the world, something "titchy" means "small". From Onelook:
titchy Show phonetics
adjective UK CHILD'S WORD
extremely small:We've got a great big car, and you've only got a titchy little one.
I think TRICKIER fits the clue best so I'll run with it.
It's tricky, isn't it? Who'd have thought a titchy crossword could have made me so tetchy? Hope you're not touchy about my not going with your suggestion.