Bottom lines? (4)
I believe the answer is:
hems
'bottom lines?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hems that I've seen before include "Bottom edges turned under and sewn" , "Stitched garment edges for Shem" , "Stitched edges of cloth or garments" , "Fringes" , "Stitched borders" .)