Crossword Genius

Los Angeles, less than clean (7)

Ross

I believe the answer is:

'clean' is the definition.
(laundering is a kind of cleaning)

'los angeles less than' is the wordplay.
'los angeles' becomes 'la'.
'less than' becomes 'under' (I've seen this before).
'la'+'under'='LAUNDER'

(Other definitions for launder that I've seen before include "Make clean again - clothes or money", "Trough", "Make illegal (money) legitimate", "Make clean, clothing or money", "Wash or cleanse, clothes or money".)

I've seen this clue in The Telegraph.