Crossword Genius

Advertising jingles transcribed on glass (7)


I believe the answer is:


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'advertising jingles' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
I also know that 'advertising' relates to this answer.

'transcribed on glass' is the wordplay.
'on glass' can be anagrammed to 'SLOGANS'.
But, I'm not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for slogans that I've seen before include "Advertising phrases" , "Campaign messages" .)

I've seen this clue in The Globe and Mail.
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