Title-holder vets cousins in need of training (11)
I believe the answer is:
viscountess
'title-holder' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'vets cousins in need of training' is the wordplay.
'in need of training' indicates an anagram.
'vets'+'cousins'='vetscousins'
'vetscousins' anagrammed gives 'VISCOUNTESS'.
Can you help me to learn more?
(Other definitions for viscountess that I've seen before include "aristocrat" , "Noblewoman" , "title for women" .)