Quote Gorki piece promoting source of alternative meaning? (5)

I believe the answer is:

roget

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'source of alternative meaning?' is the definition.
The definition suggests a singular noun which matches the answer.

'quote gorki piece promoting' is the wordplay.
'piece' indicates a hidden word.
'promoting' is a reversal indicator (I've seen 'promoted' mean this (going up, in a down clue)).
'tegor' is hidden within 'quote gorki'.
'tegor' backwards is 'ROGET'.

Can you help me to learn more?

(Other definitions for roget that I've seen before include "Collector of words" , "From bookmaker" , "Item of clothing; confer" , "Thesaurus creator" , "man of many words" .)

I've seen this clue in The Guardian.

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