The most common and most likely answer to this crossword clue is the 10 letter word HIGH-RISES
H
I
G
H
-
R
I
S
E
S
Buddy explains!

The straight part
We know that "Manhattan skyline, perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case manhattan skyline, perhaps = high-rises.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.
What does HIGH-RISES mean?
HIGH-RISES noun- A tall building, one of many stories.