Fool around with metal edge of roadway, for the most part (6)
I believe the answer is:
tinker
'fool around' is the definition.
(thesaurus)
'metal edge of roadway for the most part' is the wordplay.
I cannot quite see how this works, but
'metal' could be 'in' (In is an example) and 'in' is found within the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
This explanation may well be incorrect...
'with' is the link.
Can you help me to learn more?
(Other definitions for tinker that I've seen before include "Fiddle with machinery" , "Potter - kettle mender" , "Make trivial adjustments - itinerant tradesman" , "Person who travels around doing repairs" , "Kettle-mender" .)