Thompson of "Westworld" (5)
I believe the answer is:
tessa
'thompson of westworld' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tessa that I've seen before include "Tax-exempt special savings account" , "Woman" , "Girl" , "Dahl or Jowell" , "Girl's name; former savings account" .)