Watch and obey (7)
I believe the answer is:
observe
This clue is a double definition.
'watch' is the first definition.
(I know that watch can be written as observe)
'obey' is the second definition.
(I've seen this before)
'and' is the link.
(Other definitions for observe that I've seen before include "taking notice" , "Obverse (anag.)" , "Mark" , "What this newspaper does?" , "See - say" .)