Three checked letters in a seven-letter answer is bad enough; two in a five-letter answer is even worse. Unless, some say, Radian has been constrained by a Nina and has been forced to use answers of this type. If he has (and of course I can’t see it) then perhaps this is justified. And anyway it’s only my view (but also that of some eminent others, I might add).
Pity, because much of this crossword is good, and there are some excellent clues. I particularly enjoyed 1dn.
Definitions underlined.