Still the old-fashioned finish for breakfast (3)
I believe the answer is:
yet
'still' is the definition.
(yet can mean still or so far)
'old-fashioned finish for breakfast' is the wordplay.
'old fashioned' becomes 'ye' (I can't explain this - if you can you should believe this answer much more).
'finish for' says to take the final letters (the letter which finishes the word).
The final letter of 'breakfast' is 't'.
'ye'+'t'='YET'
'the' is the link.
Can you help me to learn more?
(Other definitions for yet that I've seen before include "Up till now" , "Still; nevertheless" , "Although" , "Up to the present time" , "'But, however (3)'" .)