The most common and most likely answer to this crossword clue is the 6 plus 2 letter word SOUPED UP
S
O
U
P
E
D
U
P
Buddy explains!

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 SOUPED UP mean?
SOUPED UP adjective- Of a racehorse: injected with a substance to make it run faster or to change its temperament.
- Of an engine, a motor vehicle, etc.: modified for higher performance.
- (United States Navy) Drunk, intoxicated.
- Excited.