Cleaner moving crates and cases (10)
I believe the answer is:
characters
'cases' is the definition.
(I know this)
'cleaner moving crates' is the wordplay.
'cleaner' becomes 'char' (charwoman is a type of cleaner).
'moving' is an anagram indicator (letters are moved around).
'crates' anagrammed gives 'acters'.
'char'+'acters'='CHARACTERS'
'and' acts as a link.
(Other definitions for characters that I've seen before include "eccentric people?" , "Persons in a play/book" , "Eccentrics" , "Signs" , "Roles; letters" .)