Initially I felt ill-disposed towards this, because of my obsession (some would call it a hang-up) with less than 50% checking, something that appears several times in the grid. But actually this is a perfectly pleasant crossword with some nice clues.
The inadequate (in my opinion) checking is sometimes excusable if there is a Nina and the setter is trying to get normal words into the grid. But in this case the Nina (which for once I’ve seen, although perhaps there is more) is fairly simple: look at the seven-letter words going diagonally from top to left, top to right, etc in the grid. They are all of a kind, and, further, the shape of the words surrounds something that may also be regarded as one of these.
Definitions underlined.