Plait or braid (5)
I believe the answer is:
tress
I believe this is a double definition.
'plait' is the first definition.
(I know that plait can be written as tress)
'braid' is the second definition.
(I know that braid can be written as tress)
(Other definitions for tress that I've seen before include "Switch" , "Braid of hair" , "is a bit of a shock" , "Bit of hair" , "Rests (anag.)" .)