Evita, say, Argentinian revolutionary guards escort (9)
I believe the answer is:
chaperone
'escort' is the definition.
(chaperoning is a kind of escorting)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for chaperone that I've seen before include "Young lady's protector" , "Companion" , "my charges are small" , "Look after" , "Duenna" .)