Noticed, spotted (6)
I believe the answer is:
espied
This clue is a double definition.
'noticed' is the first definition.
(I've seen this in another clue)
'spotted' is the second definition.
('espy' can be a synonym of 'spot')
(Other definitions for espied that I've seen before include "Watched" , "observed in literature" , "Spotted; saw" , "Saw (archaic)" , "Caught sight of (archaic)" .)