... yours truly had reportedly seen (4)
I believe the answer is:
eyed
'seen' is the definition.
(I've seen this in another clue)
'yours truly had reportedly' is the wordplay.
'yours truly had' becomes 'I'd' ('I had', referring to the crossword setter).
'reportedly' shows a homophone (sound like).
'id' sounds like 'EYED'.
(Other definitions for eyed that I've seen before include "Stared at" , "Spotted" , "Looked at, warily perhaps" , "Watched warily" , "Watched, looked at" .)