The most common and most likely answer to this crossword clue is the 8 letter word QUESTING
Q
U
E
S
T
I
N
G
Buddy explains!
The straight part
We know that "Seeking" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case seeking = questing.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 QUESTING mean?
QUESTING verb- To seek or pursue a goal; to undertake a mission or job.
- To search for; to examine.
- (of a tick) To locate and attach to a host animal.
- The act of going in quest of something.