Popular new tavern (3)
I believe the answer is:
inn
'tavern' is the definition.
(I've seen this in another clue)
'popular new' is the wordplay.
'popular' becomes 'in' ('in' can mean trendy).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'in'+'n'='INN'
(Other definitions for inn that I've seen before include "Jamaica, for one" , "One of Lincoln's" , "Roadhouse" , ". . . of the Sixth Happiness (film)" , "Country pub, often with accommodation" .)