Funny lines in publicity for beer (7)
I believe the answer is:
pilsner
'for beer' is the definition.
(pilsner is a kind of beer)
'funny lines in publicity' is the wordplay.
'funny' indicates anagramming the letters.
'in' is an insertion indicator.
'publicity' becomes 'PR' (abbreviation for public relations).
'lines' anagrammed gives 'ilsne'.
'ilsne' going within 'pr' is 'PILSNER'.
(Other definitions for pilsner that I've seen before include "Bar tab might include this" , "drink" , "alcohol" , "Type of lager" , "Czech beer" .)