Fundamental for business keeping watch chains (6)
I believe the answer is:
albert
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?
(Other definitions for albert that I've seen before include "Prince of Monaco" , "and 7: French missionary" , "- Square, Walford (EastEnders)" , "Old watch chain" , "M [MUSEUM] with 18 [VICTORIA]" .)