Weaken the standard (4)

I believe the answer is:

flag

I believe this is a double definition.

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

'the standard' is the second definition.
(standard is a type of flag)

(Other definitions for flag that I've seen before include "fade" , "Plant; paving slab" , "Give a signal" , "Iris - banner" , "Iris - paving slab" .)

I've seen this clue in the Evening Standard.

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