Noticed or remarked (8)
I believe the answer is:
observed
This clue is a double definition.
'noticed' is the first definition.
(similar in meaning)
'remarked' is the second definition.
('observe' can be a synonym of 'remark')
(Other definitions for observed that I've seen before include "Noticed or remarked" , "Said" , "celebrated" , "Noticed or followed the rules" , "Ascertained by sight" .)