Wrinkle or furrow (6)
I believe the answer is:
crease
This clue is a double definition.
'wrinkle' is the first definition.
(synonyms)
'furrow' is the second definition.
(synonyms)
(Other definitions for crease that I've seen before include "found on cricket pitch" , "Cricket pitch marking" , "Furrow; cricket line" , "Wrinkle on the cricket pitch?" , "Line produced by folding" .)