Ronald is not going all out to see her (5)
I believe the answer is:
lorna
'her' is the definition.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for lorna that I've seen before include "girl" , "Female" , "-- Doone (book)" , "-- Doone, novel" , "and 21 Down: Novel by R.D. Blackmore" .)