The most common and most likely answer to this crossword clue is the 3 plus 4 letter word RED CENT
R
E
D
C
E
N
T
More clues leading to the result RED CENT
Buddy explains!
The straight part
We know that "Paltry sum" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case paltry sum = red cent.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.