Working adult cutting a fringe normally (2,7)
I believe the answer is:
on average
'normally' is the definition.
(on average can mean normally or typically)
'working adult cutting a fringe' is the wordplay.
I cannot quite see how this works, but
'working' could be 'on' (on can mean working or activated) and 'on' is found in the answer.
'adult' could be 'a' (abbreviation) and 'a' is located in the answer.
'a' is within the answer.
'fringe' could be 'verge' and 'verge' is present in the remaining letters.
No letters remain.
This explanation may well be incorrect...
(Other definitions for on average that I've seen before include "typically speaking" , "Generally" , "Usually" .)