Female pro in sci-fi classic struggle (6)
I believe the answer is:
effort
'struggle' is the definition.
(I've seen this in another clue)
'female pro in sci-fi classic' is the wordplay.
'female' becomes 'f' (common abbreviation).
'pro' becomes 'for' (I've seen this before).
'in' is an insertion indicator.
'sci-fi classic' becomes 'et' (I can't explain this - if you can you should give a lot more credence to this answer).
'f'+'for'='ffor'
'ffor' put inside 'et' is 'EFFORT'.
Can you help me to learn more?
(Other definitions for effort that I've seen before include "Vigorous attempt" , "Strain" , "The use of physical or mental energy" , "Try - labour - pains" , "Serious industry - attempt" .)