Designer Lauren (5)
I believe the answer is:
ralph
'designer lauren' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ralph that I've seen before include "Boy's name" , "--- Waldo Emerson, US writer" , "N Waldo Emerson, nineteenth century US poet" , "Chap" , "American poet and essayist" .)