The attraction of getting half fare, with a bit of luck (4)
I believe the answer is:
lure
'the attraction' is the definition.
(lure is a kind of attraction)
'getting half fare with a bit of luck' is the wordplay.
'getting' becomes 'u' (I can't explain this - if you can you should give a lot more credence to this answer).
'half' indicates taking half.
'with' is a charade indicator (letters next to each other).
'a bit of' indicates taking the first letters.
The initial letter of 'luck' is 'l'.
'fare' cut in half is 're'.
'u'+'re'='ure'
'ure' put after 'l' is 'LURE'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for lure that I've seen before include "It's used to attract fish" , "'Decoy, bait (4)'" , "Tempt with some kind of reward" , "Entice, bait" , "Tempt invoking rule" .)