"Doctor Who" actress Gillan (5)
I believe the answer is:
karen
'doctor who actress gillan' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for karen that I've seen before include "oriental language" , "Carpenter of note" , "Girl's name - ethnic Thai in Burma" , "One at home in 15 across [AARHUS]" , "Girl" .)