"I Love Lucy" role (5)
I believe the answer is:
ethel
'i love lucy role' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ethel that I've seen before include "Dame --- Smyth; William Brown's sister" , "Lethe (anag) -- Barrymore or Merman" , "- Merman, US actress" , "girl" , "Trying not to be seen" .)