Rites using flags (5)

I believe the answer is:

tires

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'flags' is the definition.
(I've seen this in another clue)

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

(Other definitions for tires that I've seen before include "Wearies" , "Exhausts" , "Becomes weary and in need of rest" , "Weakens" , "Grows weary of rites" .)

I've seen this clue in The Mirror.

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