Elizabethan collar (4)
I believe the answer is:
ruff
'elizabethan collar' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ruff that I've seen before include "Male sandpiper" , "Jacobean neckwear" , "Elizabethan or Jacobean neck adornment" , "Starched neck frill" , "(At bridge) trump" .)