Pianist Hess (4)
I believe the answer is:
myra
'pianist hess' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for myra that I've seen before include "- - Breckenridge (novel)" , "Dame --- Hess; Vidal's Breckinridge" , "Girl" , "Girl's name" , "Woman's name, anagram of army" .)