Pet lady trained with skill (7)
I believe the answer is:
adeptly
'with skill' is the definition.
(I've seen this before)
'pet lady trained' is the wordplay.
'trained' indicates anagramming the letters (to train can mean to grow something into a shape).
'pet'+'lady'='petlady'
'petlady' is an anagram of 'ADEPTLY'.
(Other definitions for adeptly that I've seen before include "Adroitly" , "with great skill" , "Showing skill" , "How experts act" , "Skilfully" .)