Barker's daughter in Dorset town (6)
I believe the answer is:
poodle
'barker's' is the definition.
(I've seen this before)
'daughter in dorset town' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'in' indicates putting letters inside.
'dorset town' becomes 'poole' (I've seen this before).
'd' put into 'poole' is 'POODLE'.
(Other definitions for poodle that I've seen before include "Pet dog - lackey" , "Curly-haired breed of dog" , "Dog (seen in a parlour?)" , "Pet dog; obsequious chap" , "Looped around the dog" .)