Stick to five lines (5)

I believe the answer is:

stave

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'stick' is the definition.
(thesaurus)

I cannot understand how the remainder of the clue works.

(Other definitions for stave that I've seen before include "Musical staff" , "Set of lines on which musical notes are written" , "Bar" , "Delay before off" , "Stanza of a poem" .)

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

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