Makes tracks beneath the cap and edges of roof (5)
I believe the answer is:
eaves
'roof' is the definition.
(thesaurus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for eaves that I've seen before include "Section of roof" , "Projecting edge of a roof" , "Overhang at edge of a roof" , "Anything projecting" , "Overhanging part of roof" .)