FA never fine time-wasting, ultimately (7)
I believe the answer is:
nothing
'fa' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'never fine time-wasting ultimately' is the wordplay.
'never' becomes 'not' (I've seen this in another clue).
'fine time' becomes 'hin' (I can't justify this - if you can you should give a lot more credence to this answer).
'ultimately' says to take the final letters.
The final letter of 'wasting' is 'g'.
'not'+'hin'+'g'='NOTHING'
Can you help me to learn more?
(Other definitions for nothing that I've seen before include "Zero, nil" , "Not anything" , "See 13" , "A void" , "Nought; of no value" .)