Hello, Elle!
Well done, to you and Jazzgirl for solving the clue!
It can be easy getting stuck in tramlines with your thinking. Tip, put the paper away, have a coffee, paint your nails, or a wee walk or something, and when you return to the crossword, the solution often jumps out at you!
I rarely get a knock at the door. The postie , usually.
All the family have keys, which they use.
I may suggest to my joiner to get a letter box with a knocker. Is that a wonderful idea?
I may look for a bulb tomorrow, after I get a haddock.
My joiner's pal is a sparky, and he is going to mention
bulbs to him.
Years back, I was told a sentence which contained "and and and and and" and made sense.
It was to do with painting a pub sign. The Cat and Fiddle, or similar.