Dog with dog's head in a Dorset resort (6)
I believe the answer is:
poodle
'dog' is the definition.
(breed of dog)
'dog's head in a dorset resort' is the wordplay.
'head' says to take the initial letters.
'in' is an insertion indicator.
'a dorset resort' becomes 'poole' (I've seen this before).
The first letter of 'dogs' is 'd'.
'd' placed within 'poole' is 'POODLE'.
'with' acts as a link.
(Other definitions for poodle that I've seen before include "Looped around the dog" , "5 [MANS BEST FRIEND]" , "Woofing" , "Pet dog with clipped curly hair" , "Pet dog - lackey" .)