The most common and most likely answer to this crossword clue is the 8 letter word IMPULSES
I've seen this crossword clue in The Daily Telegraph
I
M
P
U
L
S
E
S
Buddy explains!

The straight part
We know that "Urges" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case urges = impulses.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 IMPULSES mean?
IMPULSES noun- A thrust; a push; a sudden force that impels.
- A wish or urge, particularly a sudden one prompting action.
- The integral of force over time.