Time to get into bubbly musical work (5)
I believe the answer is:
motet
'musical work' is the definition.
(I've seen this in another clue)
'time to get into bubbly' is the wordplay.
'time' becomes 't' (abbreviation).
'to get into' indicates putting letters inside.
'bubbly' becomes 'Moet' (Moet is a type of champagne).
't' put into 'moet' is 'MOTET'.
(Other definitions for motet that I've seen before include "Church choral composition" , "Certain one is morally superior" , "Polyphonic choral liturgical piece" , "Unaccompanied choral composition with sacred lyrics" , "Short sacred choral piece" .)