Crossword Genius

Date supervisor found within open reach (9)

Ross

I believe the answer is:

chaperone

I'm a little stuck... Click here to teach me more about this clue!

'date supervisor' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe you can see a link between them that I don't see?

'within open reach' is the wordplay.
'open reach' anagrams to 'CHAPERONE'.
However, I'm unsure how this is indicated.

'found' acts as a link.

Can you help me to learn more?

(Other definitions for chaperone that I've seen before include "attendant" , "Guardian" , "my charges are small" , "One overseeing" , "Companion" .)

I've seen this clue in the Sydney Morning Herald.
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