The most common and most likely answer to this crossword clue is the 7 letter word AWAKENS
A
W
A
K
E
N
S
More clues leading to the result AWAKENS
Buddy explains!

The straight part
We know that "Is rousing" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case is rousing = awakens.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 AWAKENS mean?
AWAKENS verb- To cause to become awake.
- To stop sleeping; awake.
- To bring into action (something previously dormant); to stimulate.
- To call to a sense of sin.