The most common and most likely answer to this crossword clue is the 6 letter word BYGONE
I've seen this crossword clue in The Times
B
Y
G
O
N
E
More clues leading to the result BYGONE
- Good acting parts see you getting past
- Previous drink knocked back, getting extra round
- Bigamy heartless: good to get married one time
- Previous drink knocked back amid cheers
- Former characters from Whitby go needy
- Former purchase, we hear, good, unique
- In lay-by, go near to get past
- Former suggestion to take alcohol confines good bridge players
- Endless Zygons infiltrate live from the past
- Disheartened boy and girl married in the past
Buddy explains!

The straight part
We know that "Previous" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case previous = bygone.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 BYGONE mean?
BYGONE noun- (usually plural) An event that happened in the past.
- Having been or happened in the distant past.