Limb found in subsidiary office (6)
I believe the answer is:
branch
I believe this is a double definition.
'limb' is the first definition.
(I know that limb can be written as branch)
'subsidiary office' is the second definition.
(I've seen this in another clue)
'found in' is the link.
(Other definitions for branch that I've seen before include "part of a big organisation" , "'Fork, offshoot (6)'" , "regional office" , "Part of organisation or tree" , "Trunk offshoot" .)