Men in crushed velvet carrying zero change (10)
I believe the answer is:
evolvement
'change' is the definition.
(I've seen this before)
'men in crushed velvet carrying zero' is the wordplay.
'in' indicates putting letters inside.
'crushed' is an anagram indicator.
'carrying' is a charade indicator (letters next to each other) (in a down clue, the bottom letters carry others).
'zero' becomes 'O' (O resembles 0).
'velvet' after 'o' is 'ovelvet'.
'ovelvet' with letters rearranged gives 'evolvet'.
'men' placed into 'evolvet' is 'EVOLVEMENT'.
(Another definition for evolvement that I've seen is " Change".)