The most common and most likely answer to this crossword clue is the 6 letter word ALBERT
I've seen this crossword clue in The Daily Telegraph
A
L
B
E
R
T
More clues leading to the result ALBERT
- Einstein's link to time?
- Einstein, maybe one having links to time?
- Bachelor wearing smart watch chain
- Chain two blokes together
- Warning about start of Brexit — keep watch on it
- Warning about Black Prince
- Man in watch?
- Fundamental for business keeping watch chains
- Man on watch around Beachy Head
- Attentive pocketing key and watch chain
Buddy explains!
The straight part
We know that "watch chain" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case watch chain = albert.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.