Crossword Genius

Flag tour round Agricola's inner sanctum (9)

Ross

I believe the answer is:

tricolour

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

'flag' is the definition.
(I know that tricolour is a type of flag)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for tricolour that I've seen before include "Standard of French perhaps" , "Having or involving three colours" , "French national flag" .)

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