Expression used by the Sherpa (6)

I believe the answer is:

phrase

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'expression' is the definition.
(phrase is a kind of expression)

'by the sherpa' is the wordplay.
'sherpa' can be anagrammed to 'PHRASE'.
However, I'm unsure how the anagram is indicated.

'used' is the link.

Can you help me to learn more?

(Other definitions for phrase that I've seen before include "Set of words for sherpa" , "Saying" , "Words for a seraph" , "Piece of music" , "Group of words/notes" .)

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