Inquisitor 1409

[Ripper]

13 down: Trees between university and loch fall every now and then (6) ?ET?LA. Also the 'expression' to write under the grid, is it just a single letter? (if it isn't I'm stumped!)
Thanks in advance

[gangesboy]

Betula

[Ripper]

Thank you gangesboy

[Kobnut]

According to Wikipedia the highlighted item covers a range. The expression could be a single letter, but I suspect it is more likely to be a mix of two expressions. A bit ambiguous I believe.

[boreas]

Any help with parsing 29D please?

[MLN:RUGBY]

Boreas
29d: Definition = first 2 words
and About, as couples do...

[MLN:RUGBY]

For some reason my answer was chopped....
suEZ canAL

[boreas]

Thanks MLN, I get it now.

[British_Olympics]

The expression is surely a combination of 30a and 8d, but which one comes first ?

[dannyk13]

Seen as Betula.

[Mysterons]

With reference to the colour wheel (https://en.wikipedia.org/wiki/RYB_color_model#/media/File:Color_star-en_(tertiary_names).svg), in this puzzle the secondary and tertiary colours are expressed as the sum of their adjacent colours moving in a clockwise direction. Therefore V = R + (R+Y)

S.I.G.