Mampara you could start in the top left corner which has a common letter or, as I did, note that there are only two 3 letter words DEN & ARM.
Following that there is only one 9 letter word where the fourth letter is D and only one 9 letter word where the 7th letter is M.
You can therefore fit in two 9 letter words which will give you a good start.
Haha ..me too ...not exactly one of the best Spectator crosswords ...it took me about half an hour and I am a dizzy dame at the best of times .I've had better puzzles in my monthly Puzzle Magazine .