She has complete confidence (5)
I believe the answer is:
faith
This clue might be a double definition.
'she' is the first definition.
'complete confidence' is the second definition.
'faith' can be an answer for 'confidence' (I've seen this before). I am not certain of the 'complete' bit.
'has' acts as a link.
Can you help me to learn more?
(Other definitions for faith that I've seen before include "A woman" , "Strong belief in a supernatural power" , "'..... will move mountains'" , "religion" , "Total trust" .)