Two I don’t understand. I completed the puzzle because these were the only answers that fit, but I have no idea why they fit.
Y
9A. Robin's green city (7). The answer is LINCOLN. For Robin I thought of Hood, but that's no help. No idea.
13A. One may waltz about in European River (7). The answer is DANCER. Guessing wildly, about = C, European River = ER, but that doesn't explain the DAN. I don't know any rivers that are an anagram of DANCER. Completely stuck.
Normally, even if the clues are rather convoluted, I can see why they give the answers they do, Any help given will be gratefully received. Ta.
John