The most common and most likely answer to this crossword clue is the 6 letter word NICKER
I've seen this crossword clue in Financial Times
N
I
C
K
E
R
More clues leading to the result NICKER
Buddy explains!

The straight part
We know that "pound" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pound = nicker.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 NICKER mean?
NICKER noun- Pound sterling.
- A soft neighing sound characteristic of a horse.
- A snigger or suppressed laugh.
- To make a soft neighing sound characteristic of a horse.
- To produce a snigger or suppressed laugh.
- One of the night brawlers of London formerly noted for breaking windows with halfpence.
- The cutting lip which projects downward at the edge of a boring bit and cuts a circular groove in the wood to limit the size of the hole that is bored.
- Someone who nicks (steals) something, a thief.