Unhappy part of press advertising (3)

I believe the answer is:

sad

'unhappy' is the definition.
(associated in meaning)

'part of press advertising' is the wordplay.
'part of' indicates a hidden word.
'SAD' is hidden in the letters of 'press advertising'.

(Other definitions for sad that I've seen before include "Melancholy, depressed" , "Morose" , "Deplorable" , "Despondent" , "Mournful - sorry" .)

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