Name on the cover of "Fear of Fifty" (5)
I believe the answer is:
erica
'name on the cover of fear of fifty' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for erica that I've seen before include "Woman" , "Plant of the heath genus" , "Heath genus; girl's name" , "Plant genus of garden heather" , "Heathland shrub; girl's name" .)