Petticoat junction? (4)
I believe the answer is:
seam
'petticoat junction?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for seam that I've seen before include "Join in knitted garment" , "Fabric joint" , "A layer of coal in ground" , "Line of sewing - stratum of coal" , "Join - thin layer" .)