With a bit of luck, a drink and something to eat (4)
I believe the answer is:
kale
'something to eat' is the definition.
(kale is a kind of food)
'with a bit of luck a drink' is the wordplay.
'with' is an insertion indicator.
'a bit of' indicates taking the first letters.
'a drink' becomes 'kae' (I can't justify this - if you can you should give a lot more credence to this answer).
The first letter of 'luck' is 'l'.
'l' placed within 'kae' is 'KALE'.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for kale that I've seen before include "Hardy cabbage" , "Curly-leafed cabbage" , "Cabbage in a lake" , "Vegetable" , "Crinkled-leaf cabbage" .)