Snatch outrageous garb (4)
I believe the answer is:
grab
'snatch' is the definition.
('grab' can be a synonym of 'snatch')
'outrageous garb' is the wordplay.
'outrageous' is an anagram indicator (I've seen this in other clues).
'garb' with letters rearranged gives 'GRAB'.
(Other definitions for grab that I've seen before include "Brag about seizure" , "Grasp roughly" , "Seize roughly" , "Seize rudely" , "Take quickly" .)