The most common and most likely answer to this crossword clue is the 5 plus 6 letter word SMALL CHANGE
I've seen this crossword clue in Financial Times
S
M
A
L
L
C
H
A
N
G
E
More clues leading to the result SMALL CHANGE
Buddy explains!
The straight part
We know that "Shops now deal with this less often" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case shops now deal with this less often = small change.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.