The most common and most likely answer to this crossword clue is the 8 letter word GRASPING
I've seen this crossword clue in Financial Times
G
R
A
S
P
I
N
G
Buddy explains!
The straight part
We know that "Panting to get hold of riches, for a start" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case panting to get hold of riches, for a start = grasping.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 GRASPING mean?
GRASPING verb- To grip; to take hold, particularly with the hand.
- To understand.
- To take advantage of something, to seize, to jump at a chance.
- The act of one who grasps or covets.
- Greedy, eager for wealth.