The most common and most likely answer to this crossword clue is the 4 plus 3 letter word YEAR END
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More clues leading to the result YEAR END
Buddy explains!

The straight part
We know that "Finale of Hogmanay" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case finale of hogmanay = year end.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does YEAR END mean?
YEAR END adjective- On or happening at the end of the year (e.g., late December).