Pop star Lizzo can sing last of all to make point (5)
I believe the answer is:
prong
'point' is the definition.
(I've seen this before)
'pop star lizzo can sing last of all' is the wordplay.
'last of all' says to take the final letters.
The last letters of 'pop star lizzo can sing' are 'PRONG'.
'to make' is the link.
(Other definitions for prong that I've seen before include "Spur; projecting part" , "tip?" , "one gets stuck into dinner" , "Point of a fork" , "Fork part" .)