Take bread and yam starters back (5,2)

I believe the answer is:

stand by

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'back' is the definition.
(thesaurus)

I cannot understand how the remainder of the clue works.

(Other definitions for stand by that I've seen before include "person ready to step into the breach" , "Act like supporters" , "Readiness for immediate deployment" , "the kind of passenger that may not get on with others" , "last-minute ticket" .)

I've seen this clue in The Daily Express.

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