Redhead in love provdies protection for warrior (6)
I believe the answer is:
armour
'provdies protection for warrior' is the definition.
I can't tell whether this definition defines the answer.
'redhead in love' is the wordplay.
'redhead' becomes 'r' (the head/first letter of 'red').
'in' is an insertion indicator.
'love' becomes 'amour' ('love' in French).
'r' going inside 'amour' is 'ARMOUR'.
Can you help me to learn more?
(Other definitions for armour that I've seen before include "Body plate" , "Old warrior's suit" , "Greave, sallet and cuirass are pieces of this" , "Metal or other protective plating for body" , "Protective body-plating" .)