Leader in Congress introducing a law about cigarette problem in fall (8)
I believe the answer is:
cataract
'fall' is the definition.
(I've seen this before)
'leader in congress introducing a law about cigarette problem' is the wordplay.
'leader in' indicates taking the first letters.
'introducing' means one lot of letters go next to another (some letters go before others).
'a law' becomes 'act' (I've seen this in another clue).
'about cigarette problem' becomes 'atar' (I am not sure about this - if you are sure you should believe this answer much more).
The initial letter of 'congress' is 'c'.
'act' after 'atar' is 'ataract'.
'c'+'ataract'='CATARACT'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for cataract that I've seen before include "Fall of water or eye ailment" , "may impair the vision" , "(Nile) waterfall" , "Waterfall - opacity of the eye" , "Large waterfall" .)