The most common and most likely answer to this crossword clue is the 8 letter word DOVETAIL
I've seen this crossword clue in Independent
D
O
V
E
T
A
I
L
More clues leading to the result DOVETAIL
- Joint check on oxygen in Irish lower house
- American went down behind joint
- Joint I loved jumping, I’m grateful to gain entry
- Joint vote cast in Irish parliament
- Joint doctor violated
- Come together when vote cast in Irish parliament
- Joint, symbol of peace Catlin endlessly passed around
- Fit together small part to clamp old vacuum’s lead
- Joint vote arranged in parliament
- Complete pain housing old soldier getting fit
Buddy explains!

The straight part
We know that "Joint" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case joint = dovetail.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.