All things considered (2,7)
I believe the answer is:
on balance
'all things considered' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for on balance that I've seen before include "Taking everything into consideration - using scales?" , "Taking one thing with another, like tightrope walker" , "All things considered, like lean bacon" , "Considering everything there is to know" , "Having taken everything into consideration" .)