Thanks to Tyke and Spike, Buddy, Paul, FJ, Culmer and SS (hope it's OK to call you that) for your votes.
The clue was a tribute to my old girl, Mattie, who was a bearded collie cross. Not that she was too good with the 'heeling' stuff.
Cheers, Jono for the challenge and a great range of clips - brought back many memories.
Re Buddy's # 14 - here they call them composite anagrams;
https://www.crosswordunclued.com/2011/01/composite-anagrams.html
I've often tried to construct one, but find them tricky ... so it's hats off to anyone who can make one work.
I'd better go and grease the abacus with some yak fat for next week ...