The most common and most likely answer to this crossword clue is the 6 letter word DUENNA
D
U
E
N
N
A
More clues leading to the result DUENNA
- Chaperone in Madrid expected lady to come back
- Lastly, had you take on an extra governess
- Girl's teacher fitting extra lesson in, finally flipping
- Girl has returned to proper governess
- Appointed grandma to dismiss a chaperone
- Oddly dour before return of old queen’s governess
- Governess expected new article to be rejected
- Governess expected girl to turn up
- Chaperone expected girl to be upset
- Older woman in charge of girls playing nude against Namibia
Buddy explains!

The straight part
We know that "escort" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case escort = duenna.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does DUENNA mean?
DUENNA noun- A chaperon of a young lady, usually an older woman.
- A governess or nanny.