Observe detail (7)
I believe the answer is:
respect
This clue is a double definition.
'observe' is the first definition.
(as in observing or respecting rules)
'detail' is the second definition.
(respect is a kind of detail)
(Other definitions for respect that I've seen before include "Hold in high regard" , "Sceptre (anag)" , "Feeling of deep admiration" , "Show honour to" , "Show deference (to)" .)