Supports the defensive efforts (6)

I believe the answer is:

stands

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'supports' is the definition.
(stand is a kind of support)

I cannot understand how the remainder of the clue works.

(Other definitions for stands that I've seen before include "Remains unchanged" , "Puts up with" , "doesn't change" , "Stadium seats" , "Remains upright" .)

I've seen this clue in the Evening Standard.

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