The most common and most likely answer to this crossword clue is the 9 letter word FRESHENED
F
R
E
S
H
E
N
E
D
More clues leading to the result FRESHENED
Buddy explains!

The straight part
We know that "perked up" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case perked up = freshened.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 FRESHENED mean?
FRESHENED verb- To become fresh.
- (of wind) To become stronger.
- (of a cow) To begin or resume giving milk, especially after calving; to cause to resume giving milk.
- To make fresh.
- To give redness to (the face or cheeks of a person with light skin).
- To make less salty; to separate, as water, from saline ingredients.
- To relieve, as a rope, by change of place where friction wears it; or to renew, as the material used to prevent chafing.
- To top up (a drink).
- To top up (primer) in a firearm.