Solution for 29 September cryptic crossword clue

Minor alteration in coins (5,6)

Solution – small change

This is a double definition clue. (For more about different clue types, refer to the sidebar under the StumbleUpon button).

So there are 2 parts to the clue and they both mean the 2 word solution.  A minor alteration could be said to be a "small change".  And the coins in your pocket are often said to be "small change".  Same phrase, 2 quite different meanings.