A girl's time of sorrow (6)
I believe the answer is:
dismay
'sorrow' is the definition.
(thesaurus)
'a girl's time' is the wordplay.
'a girl's' becomes 'Dis' (Di is short for Diana).
'time' becomes 'may' (I've seen this before).
'dis'+'may'='DISMAY'
'of' is the link.
(Other definitions for dismay that I've seen before include "Disappointment" , "Feeling of despair in the face of obstacles" , "trouble" , "Fill with apprehension" , "Consternation, trepidation" .)