Solution for 21 March cryptic clue

A new finding: voices become distorted in drought conditions (9)

Solution – Discovery

Obviously, the first part matches the solution.  How does the second part work?  The word voices “becomes distorted” ie letters mixed up.  But that is only 6 letters and the solution needs 9.  Dry = drought conditions.  So the letters of voices mixed up are “in” the word dry.