Some help will be appreciated for these remaining, tricky ones, please!
11a Dull-grey pelt(5): ??ON?
26a Joiner points to range(5): ????S
31a Farming practice at the end of August in holiday area(8, hyphened): ?????I?E
1d Powerful variant of northern stigma(14, 4 words);
S?R?SG???????M
Many thanks!