Many labels come undone, certainly (2,3,5)
I believe the answer is:
by all means
'certainly' is the definition.
(I've seen this before)
'many labels come undone' is the wordplay.
'many labels' anagrams to 'BY ALL MEANS'.
However, I'm not clear how this is indicated.
Can you help me to learn more?
(Other definitions for by all means that I've seen before include "how the versatile work?" , "expression of agreement" , "Please do" , "Of course, certainly" , "Be my guest!" .)