The most common and most likely answer to this crossword clue is the 10 plus 5 letter word TELESCOPIC SIGHT
I've seen this crossword clue in Financial Times
T
E
L
E
S
C
O
P
I
C
S
I
G
H
T
Buddy explains!
The straight part
We know that "Could this yield" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case could this yield = telescopic sight.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.