The most common and most likely answer to this crossword clue is the 5 plus 2 plus 3 letter word HOLES IN ONE
I've seen this crossword clue in The Guardian
H
O
L
E
S
I
N
O
N
E
More clues leading to the result HOLES IN ONE
Buddy explains!
The straight part
We know that "Eagles maybe" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case eagles maybe = holes in one.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.