Protection for Romeo barging into affair in Paris (6)
I believe the answer is:
armour
'protection' is the definition.
(armour protects a warrior)
'romeo barging into affair in paris' is the wordplay.
I cannot quite understand how this works, but
'romeo' could be 'r' (phonetic alphabet: alpha, bravo, charlie etc.) and 'r' is found in the answer.
'affair' could be 'amour' (amour can mean a love affair) and 'amour' is found within the remaining letters.
No letters remain.
This explanation may well be incorrect...
'for' is the link.
Can you help me to learn more?
(Other definitions for armour that I've seen before include "Metal or chainmail suit" , "Knight's attire" , "Protective covering made of metal" , "Chain mail, e.g." , "Protective metal covering for combat" .)