She requires daily treatment (5)
I believe the answer is:
lydia
'she' is the definition.
(woman's name)
'daily treatment' is the wordplay.
'treatment' is an anagram indicator (the letters must be processed or treated).
'daily' with letters rearranged gives 'LYDIA'.
'requires' acts as a link.
(Other definitions for lydia that I've seen before include "where Croesus was king" , "Female" , "Daily it's a girl's name" , "lady" , "Old country" .)