Hiya aristo & Greedy kite,
Syzzie sent me this and I printed it off last night, I've done well on the left hand side and got 4 in the North-East corner, but can't seem to get a sniff in the South-East corner. The closest I have to that area is 41 & 53 Across. I can't get the three Theme words but have ideas on a few of the variations.
I had to look in the Urban Dict to check my answer for 19 Across which I am now happy with.
I have 6 letters in 1 Across, and that can only be one answer to the variation, but can't get the theme at 48 Across.
33 Across is a bit vague for now and 33 Down is holding me back (is it the Italian explorer?)
Some hints (not too many) would be most appreciated, maybe a nudge in the right direction please chaps.