The most common and most likely answer to this crossword clue is the 5 letter word COINS
I've seen this crossword clue in The Guardian
C
O
I
N
S
Buddy explains!

The straight part
We know that "change" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case change = coins.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 COINS mean?
COINS noun- (money) A piece of currency, usually metallic and in the shape of a disc, but sometimes polygonal, or with a hole in the middle.
- A token used in a special establishment like a casino.
- That which serves for payment or recompense.
- Money in general, not limited to coins.
- One of the suits of minor arcana in tarot, or a card of that suit.
- A corner or external angle.
- A small circular slice of food.
- A cryptocurrency.
- To make of a definite fineness, and convert into coins, as a mass of metal.
- (by extension) To make or fabricate.
- To acquire rapidly, as money; to make.