Said to wish for massage (5)

I believe the answer is:

knead

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'for massage' is the definition.
(synonyms)

I cannot understand how the rest of the clue works.

(Other definitions for knead that I've seen before include "Pummel dough" , "Work (dough) into mass" , "Work (dough/clay)" , "Work flour into dough manually" , "Work dough or massage flesh" .)

I've seen this clue in The Sun.

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