Ludo, my way in worked for me - but other solvers maybe had different approaches!
I had all the conventional answers and noticed that there were only two six-letter answers in those. One answer had an interesting letter in it, so I tried fitting it into the two six-letter spaces … it would only work in one. I then built up a few others around it - and at the same time, put the other six-letter answer in the only other available space. Fitting in the terminal answers involved a bit more trial and error, as there were more options available, but I did those in pencil.
PS I've no longer got my scribbles, notes, so I hope I've remembered this properly!