What does the cryptic crossword clue "Top dog, say I, for close observation (5,3)" mean?

The definition is "close observation". The wordplay uses a homophone (sounds like). [b]EAGLE + homophone of “I” The answer is EAGLEEYE.

Top dog, say I, for close observation (5,3)

Guardian Cryptic #28924 | 25 Across | 2022-11-25 flower