Catch confusion about popular song in small talk (8)
I believe the answer is:
chitchat
'small talk' is the definition.
(synonyms)
'catch confusion about popular song' is the wordplay.
'confusion' is an anagram indicator.
'about' means one lot of letters goes inside another.
'popular song' becomes 'hit' (a hit song).
'catch' is an anagram of 'cchat'.
'cchat' enclosing 'hit' is 'CHITCHAT'.
'in' acts as a link.
(Other definitions for chitchat that I've seen before include "Light informal conversation" , "Inconsequential talk" , "Trivial conversation" , "Light social conversation" , "Idle talk" .)