Genre also difficult for advertising worker (9)
I believe the answer is:
sloganeer
'advertising worker' is the definition.
'genre also difficult' is the wordplay.
'difficult' is an anagram indicator.
'genre'+'also'='genrealso'
'genrealso' anagrammed gives 'SLOGANEER'.
'for' acts as a link.
(Other definitions for sloganeer that I've seen before include "bearer of a message" , "sound bite producer?" , "Inventor of memorable phrases for campaigning" , "Use catchphrases" .)