A shop, alas, mistreated dog (5,4)
I believe the answer is:
lhasa apso
'dog' is the definition.
(Lhasa apso is an example)
'a shop alas mistreated' is the wordplay.
'mistreated' indicates anagramming the letters.
'a'+'shop'+'alas'='ashopalas'
'ashopalas' with letters rearranged gives 'LHASA APSO'.
(Other definitions for lhasa apso that I've seen before include "small dog" , "Tibetan breed of dog - a salsa hop (anag)" , "Shown [AT CRUFTS]" .)