An edgy puzzle 
Memorable mission ALAMO [I was thinking lunar, etc.]
Snow-rain-heat-gloom connector NOR [from U.S. Postal Service motto]
Kind of participle found in the sentence "While working on my computer, the dog pestered me for dinner." DANGLING [the longest clue I have ever seen]
Border terriers are not herding dogs, as are border collies, but are hunting dogs that chase small game and vermin for hunters to shoot.
