cruciluci
The other two groups are four synonyms of one of the two main thematic items and the four longer items that all have an appendage (front or back) of the other thematic item
I am definitely struggling. I thought I had 1 across (from the fourth Wall clue) although I hadn’t fully parsed it. But 2 down has scuppered that. I now have “Ham?ni?ed” which is mince. A nudge (or possibly a massive shove) would be welcome.
Thank you, Buddy. Seems like I got the wrong clue, too… Stripping layers of wallpaper (at least four, possibly more) which have been laid on top of each other back almost 100 years must be taking its toll on me!