Praise a piano break including Liszt's first (8)
I believe the answer is:
applause
'praise' is the definition.
(thesaurus)
'a piano break including liszt's first' is the wordplay.
'piano' becomes 'p' (musical abbreviation).
'break' becomes 'pause' (synonyms).
'including' is an insertion indicator.
'liszt's first' becomes 'l' (pst letter of 'liszt').
'pause' going around 'l' is 'plause'.
'a'+'p'+'plause'='APPLAUSE'
(Other definitions for applause that I've seen before include "Gesture of approval" , "Audible indication of approval or praise" , "Show of appreciation" , "loud support" , "Clapping of hands" .)