The most common and most likely answer to this crossword clue is the 9 letter word ASPIRATED
I've seen this crossword clue in Financial Times
A
S
P
I
R
A
T
E
D
Buddy explains!

The straight part
We know that "Sucked up" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sucked up = aspirated.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 ASPIRATED mean?
ASPIRATED verb- To remove a liquid or gas by means of suction.
- To inhale so as to draw something other than air into one's lungs.
- To produce an audible puff of breath. especially following a consonant.
- Pronounced with an audible breath.