Snatch new garb (4)
I believe the answer is:
grab
'snatch' is the definition.
(I know that snatch can be written as grab)
'new garb' is the wordplay.
'new' is an anagram indicator.
'garb' anagrammed gives 'GRAB'.
(Other definitions for grab that I've seen before include "Impress" , "Seize hold of" , "Brag about seizure" , "Seize rudely" , "Seize suddenly" .)