What thespian finds tough to memorise brings bad luck (4,5)
I believe the answer is:
hard lines
'bad luck' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for hard lines that I've seen before include "Tough" , "Bad luck" , "Script full of tongue-twisters?" .)