Female nurse headed to give assistance (4)
I believe the answer is:
enid
'give assistance' is the definition.
The definition suggests a singular noun which matches the answer.
'female nurse headed' is the wordplay.
I cannot quite understand how this works, but
'nurse' could be 'en' (abbreviation for enrolled nurse) and 'en' is found within the answer.
The remaining letters 'id' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for enid that I've seen before include "Dine out on this girl's name also" , "- Blyton, children's writer" , "Geraint's loved one" , "Woman" , "Writer of children's books, d. 1968" .)