I'm stuck on the last two.
31A Opt for unpractical (8) ?R?C???O
26D Tara's instrument (4) ?T??
The last letter of 26D is also the sixth letter of 31A. In case anything is wrong, I have:
29A Doughty (8) ATHLETIC
27D Bullock's bounce (4) ECHO
For those unfortunate souls who don't have access to the Wee Stinker, it's always available on line at the Press Reader site. This weeks edition is here (make sure the link doesn't wordwrap!):
http://www.pressreader.com/uk/the-herald/20150831/282557311966209/TextView