I have completed apart from the two words to highlight any hints please, have looked at the other thread to no avail, any other help would be most welcome.
gribble, if you've found the right extra letters in the down clues they should read "grid is given stir in hole". This wordplay resolves to an eight letter word. If you look up the general theme word in any thesaurus, you should find it given as a an option. I'd recommend getting Bradford if you don't have it. If you then look up the eight letter word, you should get a five letter alternative which is in the grid, and the accessory appears shortly afterwards in Bradford.